Thorough

Definition: Thorough

Thorough

Adjective

1. Painstakingly careful and accurate; "our accountant is thorough"; "thorough research".

2. Very thorough; exhaustively complete; "an exhaustive study"; "made a thorough search"; "thoroughgoing research".

Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved.
 

Date "thorough" was first used in popular English literature: sometime before 1350. (references)

Synonyms: Thorough

Completeness

Adjective: complete, entire; whole; perfect; full, good, absolute, thorough, plenary; solid, undivided; with all its parts; all-sided.

Completion

Done, completed; Verb: done for, sped, wrought out; highly wrought; (preparation); thorough; ripe; (ready).

Restoration

Repair; put in repair, remanufacture, put in thorough repair, put in complete repair; retouch, refashion, botch, vamp, tinker, cobble; do up, patch up, touch up, plaster up, vamp up; darn, finedraw, heelpiece; stop a gap, stanch, staunch, caulk, calk, careen, splice, bind up wounds.

Crosswords: Thorough

Well, that's what you get for not being thorough. (Veritas: The Quest; writing credit: Brad Falchuk)

Sometimes your shallowness is so thorough, it's almost like depth (Daria; writing credit: Glenn Eichler; Peggy Nicoll)

Dave, although you took thorough precautions in the pod against my hearing you, I could see your lips move (2001: A Space Odyssey; writing credit: Stanley Kubrick; Arthur C. Clarke)

Source: compiled by the editor from various references; see credits.

Books

• American Cancer Society: Women and Cancer: A Thorough and Compassionate Resource for Patients and Their Families (reference)

  (more book examples)

Music

• Thorough Scrutiny [EXPLICIT LYRICS] (reference)

  (more classical music examples; more popular music examples)

Source: compiled by the editor from various references; see credits.

Supervisory Naval Architect Morton Gertler directs Instrument Maker Carson W. Caudle in preparing a model of the submarine for further tests at the David Taylor Model Basin, Carderock, Maryland, 1 March 1956. "This new type of submarine hull design was selected from a systematic series of streamlined bodies developed by Mr. Gertler, who also supervised the thorough development testing program that resulted in the hull and appendages as they now exist on the submarine Albacore." (quoted from the original picture caption). Credit: NAVY.

Women are trained as engine mechanics in thorough Douglas training methods, Douglas Aircraft Company, Long Beach, Calif. Credit: Library of Congress.

Source: pictures compiled by the editor from various references; see picture credits.

Source: compiled by the editor from various references.

And how does the bourgeoisie get over these crises? On the one hand inforced destruction of a mass of productive forces; on the other, by the conquest of new markets, and by the more thorough exploitation of the old ones. (reference)

Source: compiled by the editor from various references.

You are a thorough humourist

After a thorough exploration of his pockets, Marius had at last got together five francs and sixteen sous

Source: compiled by the editor from various references.

Health

The physician will take a medical history and perform a thorough physical examination. (references)

NIDDM patients should undergo a thorough medical evaluation prior to increasing physical activity. (references)

Refrigeration may slow the growth of some bacteria, but thorough cooking is needed to destroy the bacteria. (references)

Business

The foreign firm should be thorough in selecting the appropriate representative. (references)

President Zedillo immediately ordered his Attorney General to conduct a thorough investigation. (references)

The best way to introduce a foreign company in the Dominican market is thorough local importers and distributors. (references)

Children

Antigua and Barbuda

The opposition UPP called for a full and thorough investigation, but observers claimed that there was an effort to cover up the incidents, rather than to prosecute in accordance with existing legislation for the protection of minors. (references)

Economic History

Peru

You should be thorough in the selection of an agent or a representative. (references)

Chile

The U.S. firm should be thorough in selecting the agent or representative. (references)

Human Rights

Bahamas

Police officials insist that their investigations are fair and thorough. (references)

Korea

The suspected individual may be subjected to a thorough investigation and punishment. (references)

Guyana

The Committee recommended that all law enforcement officials receive thorough training in international human rights standards. (references)

Political Economy

RUSSIA

The first results show the new tariff structure has made modest progress in the government's goal of simplifying customs administration, reducing fraud, and through better compliance eventually increasing customs revenues, although more thorough going customs reform will be needed to make more substantial progress toward these objectives. (references)

Trade

Japan

As such, U.S. exporters are encouraged to conduct thorough research and background checks pertaining to any potential sale of controlled or sensitive items, especially with an eye towards potential transshipment through Japan. (references)

Taiwan

Border inspection of meat products consists of a visual inspection of the product, a random test for animal drugs and pesticide residues, and a thorough check of the accompanying health certificates for accuracy and completeness. (references)

Travel

Saudi Arabia

Customs inspections at ports of entry are thorough. (references)

Burma

Personal baggage is subject to a thorough search and x-ray both on arrival and departure. (references)

Portugal

They are thorough to a fault, often pouring over all the documents relative to a negotiation, and not too ready "to just hit the highlights". (references)

Worker Rights

Bosnia and Herzegovina

In most cases, the police do not conduct thorough investigations against the bar owners and others involved in the recruitment, transportation, and movement of such women, including trafficking rings. (references)

Cote d'Ivoire

The number is difficult to estimate because many Malian adults also worked on Ivoirian farms and plantations in the same area under difficult conditions, and no thorough survey has been conducted; however, the international NGO Save the Children estimated that approximately 15,000 trafficked children are working on plantations in the country. (references)

Source: compiled by the editor from ICON Group International, Inc.; see credits.

Source: compiled by the editor from various references.

Expressions using "thorough": give it a thorough sweep! ♦ thorough bass ♦ thorough going ♦ thorough rest ♦ thorough student ♦ Toll thorough. Additional references.

Beginning with "thorough": Thorough-brace, thorough-colour, thorough-going, Thorough-lighted, thorough-paced.

Ending with "thorough": remarkably-thorough, too-thorough.

Albanian

tërësor (all out, complete, comprehensive, dyed in the wool), i tërë (all, clear, downright, entire, gross, integral, total, undivided, whole), i plotë (all out, big, broad, clear, close, complete, comprehensive, crowded, dead, direct, dyed in the wool, entire, flush, fraught, full, gross, integral, out and out, outright, overall, perfect, plenary, Plumb, plummy, pregnant, radical, round, sheer, solid, thoroughgoing, total, unabbreviated, uncut, unquestioning, utter, whole). (various references)

Arabic 

‏كامل (absolute, all out, complete, completed, concluded, consummate, entire, essential, finalized, finished, full, full blown, full scale, integral, integrate, out and out, outright, perfect, plenary, plumb, rounded off, stark, thoroughgoing, total, unqualified, utter, whole), ‏متعمق (profound), ‏مجتهد (assiduous, diligent, hard working, industrious, painstaking), ‏تام (blank, complete, crass, entire, every, flat, gone, implicit, integral, outright, perfect, perfected, performed, plenary, pure, rank, regular, round, sound, thoroughgoing, unconditional, unequivocal, unqualified, utter, whole), ‏عميق (abstruse, cordial, deep, fast, heavy, ingrained, inward, passionate, profound, sound), ‏ضليع (accomplished, erudite), ‏شامل (catholic, comprehensible, comprehensive, extensive, full, full scale, general, generic, global, including, inclusive, overall, pandemic, perfect, sweeping, total, universal). (various references)

Bulgarian 

старателен (assiduous, careful, painstaking, patient, studious), усърден (assiduous, diligent, hard, industrious, mettled, mettlesome, painstaking, patient, sedulous, strenuous, studious, warm), радикален (radical, thoroughgoing), цялостен (across the board, all around, all out, complete, intact, integral, integrate, mass, organic, overall, radical, teetotal, total, whole), цял (cool, entire, full, good, intact, integral, integrate, livelong, overall, perfect, regular, right, round, sheer, solid, thoroughgoing, thorough-paced, total, unabridged, unbroken, undivided, whole), категоричен (categorical, decided, definite, definitive, emphatic, explicit, final, flat, irresistible, outright, plump, point blank, positive, unconditional, utter), грижлив (attentive, careful, fatherly, mindful, nice, regardful, solicitous, tender, thoughtful, tidy), основен (abecedarian, alkali, alkaline, basal, basic, bottom, capital, essential, fundamental, general, grade, gut, key, key note, main, organic, pivotal, polar, primal, prime, primitive, primordial, principal, radical, rudimental, rudimentary, substantial, thoroughgoing, tonic, ultimate, underlying), обстоен (circumstantial, detailed, substantial), истински (actual, authentic, authentically, bona fide, factual, for real, genuine, genuinely, good, honest, mere, natural, par excellence, positive, precious, proper, pucka, pukka, pure, real, regular, regularly, right, right-down, sheer, simon-pure, thoroughgoing, thorough-paced, true, true blue, true born, truly, truthful, unadulterated, unfeigned, veridical, veritable, very, virtual). (various references)

Chinese 

透 (penetrating, to pass through, to penetrate, to pierce), 澈 (clear), 深入 (penetrate deeply), 徹底 (complete), 徹 (pass through, penetrate, penetrating, pervade), 周密 (careful), 周到. (various references)

Czech

veskrz, svìdomitý (conscientious, dutiful, religious, scrupulous), peèlivý (careful, painstaking, rigorous), naprostý (absolute, bloody, complete, dead, downright, entire, full, outright, perfect, positive, rank, sheer, teetotal, thoroughgoing, unadulterated, unconditional, unmitigated, utter), dokonalý (accomplished, cast iron, consummate, ideal, immaculate, impeccable, perfect, proficient, unqualified, utter, very), detailní (comprehensive, detailed, punctual), dùkladný (close, elaborate, firm, good, in depth, intimate, painstaking, particular, profound, sound, stout, strong, substantial, thoroughgoing), dùkladnì (closely, soundly, well). (various references)

Danish

grundig afskylning i drikkevand (thorough rinsing with potable water), det er endvidere en foelge af austenitiseringen ved hoejere temperatur,at de kaedeformigt anbragte karbider i ferritkorngraenserne ligger taettere (as a further result of a more thorough austenitizing it is observed that thicker carbide films occur in the ferrite grain boundaries). (various references)

Dutch

met drinkwater grondig schoongemaakt (thorough rinsing with potable water), hebben een grondige gedachtenwisseling gehouden (to hold a thorough exchange of views), dikkere carbidelagen vormen zich aan de grenzen van de ferrietkristallen als verder gevolg van een grotere austenietvorming (as a further result of a more thorough austenitizing it is observed that thicker carbide films occur in the ferrite grain boundaries). (various references)

Farsi 

کامل (Absolute, Complete, Culminant, Exact, Intact, Integral, Large, Main, Mature, Perfect, Plenary, Stark, Unabridged, Unmitigated, Unqualified, Whole), تمام (All, Complete, Entire, Full, Integral, Main, Off, Outandout, Through, Whole), ازاول تااخر, بطورکامل (Hipandthigh). (various references)

Finnish

tyhjentävä (exhaustive), syvällinen (deep, profound), perusteellinen (profound), perinpohjainen (circumstantial, detailed), kertakaikkinen (absolute, lump, once-and-for-all), kertainen (absolute, lump, once-and-for-all), aimo (fair-sized, good, proper). (various references)

French

profond, plein (thick, thick stroke), minutieux, consciencieux, approfondi, ample. (various references)

German

vollständig (absolutely, complete, completely, entire, entirely, full, in full, integral, outright, perfect, plenary, quite, to the full, total, totally, unqualified), vollkommen (absolute, absolutely, altogether, complete, completely, consummate, ideal, integral, out and out, outright, perfect, perfectly, plenarily, profound, quintessential, thoroughly, totally, unflawed, unmitigated, utter), voll (bang, bombed out, brimful, canned, chubby, complete, completely, fraught, full, fully, integral, mellow, plastered, plenary, plenteous, plenteously, plentiful, plump, replete, repletely, rich, ripe, rotund, slewed, solid, thick, undiluted, undivided, unqualified, whole), völlig (absolutely, altogether, arrant, complete, completely, consummately, dead, downright, entirely, full, fully, out and out, outright, perfect, perfectly, plain, profound, quite, sheer, through, total, totally, uncompromisingly, utterly, wanton, wholly, widely), umfassend (blanket, broad, capacious, complete, comprehensive, comprising, enfolding, explicitly, extended, extensive, full, global, omnibus, sweeping, wholesale, wide), sorgfältig (careful, carefull, carefully, elaboratively, jealously, meticulous, meticulously, painstaking, painstakingly, studious, studiously, studiousness, tender), solide (firm, reasonable, respectable, sober, solid, solidly, sound, soundly, steady, stoutly, strong, strongly, sturdy, substantially, unexceptionable), reiflich (careful), perfekt (complete, perfect, perfect tense, perfectly, settled, ultimate), gründlich (careful, clean, exhaustive, extensively, fundamental, in depth, intimate, intimately, methodical, outright, painstaking, profound, profoundly, radical, radically, rigorous, roundly, searching, searchingly, sound, soundly, thoroughgoing, thoroughly), eingehend (closely, detailed, exhaustive, in depth, in detail, incoming, radical, thoroughgoing), echt (authentic, bona fide, fast, genuine, genuinely, legit, natural, positively, proper, properly, pukka, real, really, sincere, true, truthful, typical, unaffected, unfeigned, veritable), bodenlos (abysmal, bottomless, indescribable). (various references)

Greek 

σε βάθος, βαθύσ (deep, deepb, profound, sound, thoro), πλήρησ (absolute, clear, complete, flush, pregnant, pregnant with, replete, stark, straight out, thoro, thoroughgoing, unabridged), εξονυχιστικόσ (thoro), εξονυχιστικός (rigorous), εντελήσ (thoro, thoroughgoing), επισταμένος (rigorous), λεπτομερής (detailed, elaborate, minute), ακριβήσ (accurate, correct, exact, just, precise, punctual, strict, thoro, true). (various references)

Hebrew 

מוחלט (absolute, categorical, certain, decided, definite, downright, outright, positive, sheer, stark, thoroughgoing, total, unqualified, utter), יסו�"י (basic, elementary, elementary school, essential, fundamental, inchoate, main, substantial, thoroughgoing, ultimate), קפ�"� י (austere, exact, meticulous, pedantic, punctilious, rigorous, stern, strait laced, strict, stringent), �'מור (absolute, complete, completion, concluded, conclusion, end, ended, entire, finish, finished, finishing, out and out, outright, perfect, sheer, stark, termination, thoroughgoing, through, total, utter, very). (various references)

Hungarian

alapos (accurate, basic, deep, drastic, exhaustive, extensive, intensive, painstaking, profound, substantial, thoroughgoing). (various references)

Indonesian

tuntas (total), teliti (accurate, minutely, particular), selesai (completed, done, finish), seksama (accurate, exact), menyeluruh (comprehensive, spread all over). (various references)

Italian

completo (absolute, all, all out, all round, arrant, blank, clear, complete, dead, entire, full, full up, implicit, inclusive, integral, intimate, out and out, outfit, outright, overall, perfect, round, set, sound, stark, suit, total, totally, unabridged, utter, whole), accurato (accurate, careful, clean, faithful, natty, nice, painstaking, painstakingly, particular, precise, sound, tidy, trim, true). (various references)

Japanese Kanji 

綿密 (careful, detailed, minute, scrupulous), 十分 (10 minutes, adequate, division into ten, enough, fully, in full, perfect, plenty, satisfactory, sufficient), 充分 (adequate, enough, fully, in full, perfect, plenty, satisfactory, sufficient), 完膚無きまで (complete), 叮嚀 (care, careful, close, conscientious, courteous, kind, polite), 念入り (careful, conscientious, scrupulous), 丁寧 (care, careful, close, conscientious, courteous, kind, polite). (various references)

Japanese Katakana 

ね�"いり (careful, conscientious, scrupulous), か�"ぷなきまで (complete, completely, thoroughly), め�"みつ (careful, detailed, minute, scrupulous), じゅうぶ�" (adequate, compound sentence, division into ten, enough, fully, important national treasure, in full, perfect, plenty, satisfactory, sufficient), ていねい (care, careful, close, conscientious, courteous, kind, polite). (various references)

Korean 

� � �한 (Exhaustive, staunch). (various references)

Manx

slane (absolute, absolute of ruler, absolutely, chin-chin, complete, entire, fully, gross, healed, intact, integer, inviolate, perfect, sane, sheer, total, unbroken, undivided, unexpurgated as edition; good bye, unexpurgated; good bye, unharmed, unhurt, unimpaired, utter, well, whole), magh as magh (downright, exceptionally, sheer, to the full, utterly), dowin (deeply, deep-rooted, involved, low, low-pitched, penetrating, profound, rapt, rich, secretive, uncommunicative). (various references)

Pig Latin

oroughthay.(various references)

Portuguese

radical (bolshevik, group, rabid, radical, radically, radicle, root), perfeito (absolute, accomplished, bijou, classic, classical, clean, close, consummate, crowned, exact, finished, flawless, handsome, impeccable, masterly, perfect, precious, sculpturesque, sound, thoroughpaced, throughly, unalloyed, undeniable, unexceptionable, unmitigated), minucioso (curious, hairsplitting, minute, narrow, niggling, particular, pernickety, rigorous, scrupulous, searching), meticuloso (careful, finical, finicky, meticulous, painstaking, picky, punctilious, scrupulous), cuidadoso (accurate, attentive, careful, chary, close, convinced, earnest, exact, gingerly, heedful, mature, meticulous, mindful, painstaking, regardful, safe, scrupulous, solicitous, tidy, tiptoe), completo (absolute, all out, all-around, all-out, all-round, arrant, bijou, clean, complete, completed, done, downright, dyed-in-the, egregious, entire, exhaustive, freehearted, full, fullbodied, outright, plenary, plumb, precious, round, run-down, sheer, sweeping, teetotal, thoroughgoing, through, thru, total, unabridged, unalloyed, unmitigated, utter, whole), íntimo (acquainted, chummy, confidential, depth, familiar, internal, intimate, near, offscreen, secret, warm). (various references)

Romanian

total (absolute, all out, blank, complete, completely, count, crass, dead, entire, exclusive, gross, inclusive, outright, perfectly, quite, sum, total, totally, unmitigated, utter, utterly, whole, wholly), temeinic (deep, profound, serious, solid, solidly, sound), scrupulos (careful, conscientious, finical, nice, particular, punctilious, qualmish, queasy, religious, scrupulous, scrupulously), profund (abstruse, deep, deeply, home-felt, keen, profound, profoundly, rootedly, sound, thick, thoughtful), perfect (a1, absolute, accomplished, all right, blameless, classic, consummate, faultless, flawless, good enough, okay, out and out, perfect, perfectly, pure, quite so, right-down, ripe, that's fine, thoroughly, thoroughpaced, tiptop, total, unimpeachable), minuţios (careful, close, elaborately, minute, painstaking, painstakingly, particular, precise, punctilious, searching, severe), detaliat (circumstantial, detailed, minute, particularly, thoroughly), desãvârşit (absolute, accomplished, blank, complete, consummate, faultless, finished, full-fledged, out and out, perfect, perfectly, pure, right-down, stark, thoroughpaced), conştiincios (careful, conscientious, conscientiously, duteous, dutiful, scrupulous, scrupulously), complet (absolute, all out, broad, clear, collected, complement, complete, completely, comprehensive, dead, down to the ground, downright, entire, entirely, every bit, every inch, exhaustive, fairly, flat, full, fully, good, hollow, outright, perfect, purely, quite, stark, strict, suite, thoroughly, thoroughpaced, to the bone, total, unabridged, utter, utterly, whole), aprofundat (elaborate, intimate), amãnunţit (amply, circumstantial, detail, detailed, elaborate, minute, narrow, particular, particularly, searching), absolut (absolute, absolutely, arbitrarily, be sure, blank, boundless, broad, categorical, categorically, coercive, complete, completely, dead, downright, emphatic, entire, essential, finished, flat, inalienable, just, perfect, physically, positive, positively, precious, pure, sheer, simple, strict, sure, there's no doubt about it, thoroughly, total, unequivocal, unfailingly, unlimited, unmistakable, unmistakably, unqualified, unrestricted, utter). (various references)

Russian 

тщательный (careful, narrow, nice, painstaking, particular, rigorous, scrupulous, searching, thoroughgoing). (various references)

Scottish

treasdach (thorough-paced), easar-chasain (thorough-fare). (various references)

Serbo-Croatian

temeljan (basic, careful, profound, solid, thoroughgoing), pravi (genuine, ortho-, plumb, proper, pucka, pukka, real, sheer, simon-pure, stark, sterling, true), okoreo (addicted, arrant, chronic, confirmed, double-dyed, dyed in the wool, impenitent, ingrain, ingrained, inveterate, obdurate, out and out), korenit (radical, rooted, rooty, thoroughgoing). (various references)

Spanish

minucioso (meticulous, minuscule, minute, probing, searching, severe). (various references)

Swedish

grundlig (close, exhaustive, in depth, out and out, out-and-out, profound, radical, searching, sound, thoroughgoing). (various references)

Thai

ที่ทำอย่างเต็มที่, ละเอีย�"ถี่ถ้วน (exhaustive). (various references)

Turkish

tam (absolute, accomplished, according to cocker, accurate, all out, at the time, bang, bang on, blank, clear, complete, consummate, correct, dead, desperately, downright, due, engrained, entire, even, exact, exactly, factual, full, full complement, fully, holo-, implicit, ingrained, intact, integral, intimate, just, literal, mathematical, on time, out and out, outright, overall, perfect, plenary, Plumb, plunk, precise, precisely, prize, prompt, proper, punctual, rank, right, rightdown, root and branch, round, sharp, sheer, simple, slap bang, slick, solid, spot-on, Square, stark, straight, strict, the very, thoroughgoing, to a t, true, trueborn, unalloyed, unambiguous, unmitigated, unredeemed, unreserved, utter, very, whole), mükemmel (accomplished, all around, alpha plus, ambrosial, bang up, banner, beyond praise, bully, capital, champion, classic, classical, classy, commanding, complete, consummate, cool, copybook, Dandy, dreamy, elegant, excellent, famous, famously, faultless, fine, finished, first class, great, immense, jolly good, no mean, par excellence, perfect, ripping, scrumptious, slap up, smashing, smooth, solid, sovereign, spiffing, spiffy, splendid, splendiferous, super, superb, superlative, that takes the cake, the dandy, thoroughgoing, tiptop, to a turn, to the nines, topping, triumphant, unique), kusursuz (accomplished, beyond reproach, blameless, capital, clean, correct, excellent, faultless, final, flawless, free from taint, immaculate, impeccable, indefectible, irreproachable, perfect, precise, root and branch, taintless, the dandy, the perfect, thoroughgoing, unblemished, unimpeachable), eksiksiz (complete, consummate, factual, in full, perfect, solid, thoroughgoing, without defect). (various references)

Ukrainian

скрупульозний (nice, punctilious, scrupulous), рів (canal, dike, ditch, moat, trench), ретельний (affectionate, assiduous, careful, diligent, dutiful, elaborate, meticulous, narrow, nice, observant, prompt, rigorous, severe), наскрізь (through, to the core), закінчений (closed, complete, ended, finished, perfect), борозна (fissure, furrow, rill). (various references)

Vietnamese 

tỉ mỉ (close, closely, conscientious, elaborately, meticulous, minute, minutely, narrowly, operose, particular, scrutinizingly), kỹ lưỡng (close, elaborate, elaborately, minutely, over, scrutinizingly, searching), ho� n to� n (all, all right, all-in-all, altogether, backbone, clean, completely, consummate, due, full, fully, heartily, hilt, hollow, inch, out-and-out, outright, perfectly, profound, purely, quite, regular, sheer, stark, thoroughly, undivided, utter, utterly, wholly), ho� n hảo cẩn thận, ho� n bị (consummate). (various references)

Welsh

trylwyr, trwyadl. (various references)

intentus. (various references)

Derivations

Words beginning with "thorough": thoroughbass, thoroughbasses, thoroughbrace, thoroughbraces, thoroughbred, thoroughbreds, thorougher, thoroughest, thoroughfare, thoroughfares, thoroughgoing, thoroughly, thoroughness, thoroughnesses, thoroughpin, thoroughpins, thoroughwort, thoroughworts. (additional references)

Misspellings

"Thorough" is suggested in spellcheckers for the following: Donough, tharough, therough, thorogh, thorought, thorugh, thourogh, thourough, throgh, throughh, throughn, thurough, Toroghu. (additional references)

Source: compiled by the editor (additional references); see credits.

Scrabble® Enable2K-Verified Anagrams

-1 letter: through.

-2 letters: though, trough.

-3 letters: grout, ortho, ought, outgo, rough, routh, thoro, tough.

-4 letters: gout, grot, hoot, hour, hurt, root, roto, rout, ruth, thou, thro, thru, thug, toro, tour, trug.

-5 letters: goo, gor, got, gut, hog, hot, hug, huh, hut, oho, ooh, oot, ort, our, out, rho, rot, rug, rut, tho, tog, too, tor, tug.

+2 letters: thorougher, thoroughly, throughout.

+3 letters: forethought, overthought, thoroughest, thoroughpin.

+4 letters: aforethought, forethoughts, thoroughbass, thoroughbred, thoroughfare, thoroughness, thoroughpins, thoroughwort, throughother.

+5 letters: thoroughbrace, thoroughbreds, thoroughfares, thoroughgoing, thoroughworts, toothbrushing.