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Common words appear frequently in written and spoken language across many genres from radio to academic journals.
Informal words should be reserved for casual, colloquial communication.
adj
not well; flimsy
Synonyms for un sound
adj
not well; flimsy
- incorrectstar
- illogicalstar
- erroneousstar
- unhealthystar
- defectivestar
- insecurestar
- fragilestar
- unsafestar
- inaccuratestar
- shakystar
- unstablestar
- insanestar
- unreliablestar
- faultystar
- unbalancedstar
- ailingstar
- crazedstar
- dangerousstar
- decrepitstar
- delicatestar
- dementedstar
- derangedstar
- diseasedstar
- fallaciousstar
Antonyms for un sound
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adj
dangerous, risky
Synonyms
adj
dangerous, risky
Antonyms
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adj
stupid; crazy
Synonyms
adj
stupid; crazy
- absurdstar
- asininestar
- bonkersstar
- crackedstar
- crackersstar
- daffystar
- dementedstar
- derangedstar
- dopeystar
- flakystar
- foolishstar
- giddystar
- half-bakedstar
- idioticstar
- inanestar
- insanestar
- lunaticstar
- madstar
- mentalstar
- nutsstar
Antonyms
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adj
broken, not working
Synonyms
adj
broken, not working
- injuredstar
- impairedstar
- run-downstar
- gonestar
- shotstar
- bentstar
- hurtstar
- downstar
- spoiledstar
- imperfectstar
- kaputstar
- on the blinkstar
- on the fritzstar
- unsoundstar
- flawedstar
- flubbedstar
- snafuedstar
- sunkstar
- bustedstar
- blemishedstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
deteriorated, debilitated, especially as a result of age
Synonyms
adj
deteriorated, debilitated, especially as a result of age
- infirmstar
- broken-downstar
- run-downstar
- shabbystar
- dilapidatedstar
- crippledstar
- frailstar
- flimsystar
- ramshacklestar
- seedystar
- ricketystar
- feeblestar
- agedstar
- antiquatedstar
- bedraggledstar
- dodderingstar
- effetestar
- fragilestar
- haggardstar
- incapacitatedstar
- insubstantialstar
- oldstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
broken, not working
Synonyms
adj
broken, not working
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
crazy, insane
Synonyms
adj
crazy, insane
- maniacalstar
- manicstar
- hystericalstar
- unhingedstar
- psychoticstar
- madstar
- derangedstar
- bananasstar
- bemusedstar
- daftstar
- deliriousstar
- distractedstar
- distraughtstar
- foolishstar
- frenziedstar
- fruitystar
- idioticstar
- lunaticstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
crazy, insane
Synonyms
adj
crazy, insane
- maniacalstar
- irrationalstar
- distractedstar
- unhingedstar
- dementedstar
- crazedstar
- unbalancedstar
- displacedstar
- perplexedstar
- disorderedstar
- unsettledstar
- nutsstar
- disconcertedstar
- apestar
- crackedstar
- bakedstar
- berserkstar
- deliriousstar
- dottystar
- franticstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
unhealthy
Synonyms
adj
unhealthy
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
wrong, incorrect
Synonyms
adj
wrong, incorrect
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
false, wrong
Synonyms
adj
false, wrong
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
wrong, made up
Synonyms
adj
wrong, made up
- fakestar
- untruestar
- distortedstar
- mistakenstar
- improperstar
- erroneousstar
- fancifulstar
- untruthfulstar
- incorrectstar
- deceitfulstar
- invalidstar
- fictitiousstar
- bogusstar
- misleadingstar
- faultystar
- inaccuratestar
- spuriousstar
- phonystar
- speciousstar
- unfoundedstar
- dishoneststar
- fraudulentstar
- unrealstar
- apocryphalstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
not working; incorrect
Synonyms
adj
not working; incorrect
- damagedstar
- erroneousstar
- inaccuratestar
- defectivestar
- inadequatestar
- deficientstar
- invalidstar
- brokenstar
- insufficientstar
- unreliablestar
- crackedstar
- leakystar
- incompletestar
- adulteratedstar
- amissstar
- awrystar
- badstar
- below parstar
- blamablestar
- debasedstar
- distortedstar
- fallaciousstar
- falliblestar
- frailstar
- impairedstar
- imperfectstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
not strong; light, thin
Synonyms
adj
not strong; light, thin
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
breakable, dainty
Synonyms
adj
breakable, dainty
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
breakable, weak
Synonyms
adj
breakable, weak
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
dangerous
Synonyms
adj
dangerous
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
dangerous, unpredictable
Synonyms
adj
dangerous, unpredictable
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
confused
Synonyms
adj
confused
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
false, artificial
Synonyms
adj
false, artificial
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
not making sense
Synonyms
adj
not making sense
- incorrectstar
- unscientificstar
- irrationalstar
- senselessstar
- unreasonablestar
- preposterousstar
- groundlessstar
- untenablestar
- absurdstar
- implausiblestar
- irrelevantstar
- inconsistentstar
- cockeyedstar
- fallaciousstar
- fatuousstar
- faultystar
- hollowstar
- inconclusivestar
- incongruousstar
- invalidstar
- madstar
- meaninglessstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
injured, faulty
Synonyms
adj
injured, faulty
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
flawed
Synonyms
adj
flawed
Antonyms
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adj
erroneous
Synonyms
adj
erroneous
Antonyms
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adj
wrong
Synonyms
adj
wrong
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
sick, weak
Synonyms
adj
sick, weak
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
dangerous, precarious
Synonyms
adj
dangerous, precarious
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
weak, imaginary
Synonyms
adj
weak, imaginary
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
worthless; unfounded
Synonyms
adj
worthless; unfounded
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
illogical, senseless
Synonyms
adj
illogical, senseless
- insanestar
- crazystar
- stupidstar
- incoherentstar
- unreasonablestar
- preposterousstar
- unsoundstar
- wrongstar
- ridiculousstar
- absurdstar
- unwisestar
- foolishstar
- aberrantstar
- wildstar
- loonystar
- ravingstar
- sillystar
- invalidstar
- brainlessstar
- deliriousstar
- dementedstar
- disconnectedstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
flimsy
adj
crazy, mad
Synonyms
adj
crazy, mad
- maniacalstar
- crazedstar
- bananasstar
- maniacstar
- psychoticstar
- stupidstar
- zanystar
- absurdstar
- irrationalstar
- bakedstar
- balmystar
- bonkersstar
- crackedstar
- daftstar
- dementedstar
- derangedstar
- flakystar
- foolishstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
crazy, insane
Synonyms
adj
crazy, insane
- fantasticstar
- frenziedstar
- deliriousstar
- kookystar
- nuttystar
- dementedstar
- franticstar
- absurdstar
- foolishstar
- psychoticstar
- aberrantstar
- bananasstar
- battystar
- crazedstar
- cuckoostar
- daftstar
- derangedstar
- distractedstar
- foolhardystar
- freneticstar
- illogicalstar
- imprudentstar
Antonyms
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adj
wrong, incorrect
Synonyms
adj
wrong, incorrect
- erroneousstar
- inaccuratestar
- inappropriatestar
- confusedstar
- misledstar
- untruestar
- faultystar
- misguidedstar
- unfoundedstar
- illogicalstar
- deludedstar
- confoundedstar
- misunderstandingstar
- warrantedstar
- fooledstar
- deceivedstar
- at faultstar
- fallaciousstar
- ill-advisedstar
- off basestar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
gloomy, nasty, sickly
Synonyms
adj
gloomy, nasty, sickly
- pessimisticstar
- melancholystar
- macabrestar
- unnaturalstar
- ghoulishstar
- ghastlystar
- gruesomestar
- grimstar
- aberrantstar
- abnormalstar
- ailingstar
- darkstar
- deadlystar
- depressedstar
- despondentstar
- diseasedstar
- dreadfulstar
- frightfulstar
Antonyms
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adj
dangerous
Synonyms
adj
dangerous
Antonyms
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adj
small, insignificant
Synonyms
adj
small, insignificant
- paltrystar
- measlystar
- inconsequentialstar
- tinystar
- frailstar
- trivialstar
- feeblestar
- diminutivestar
- fragilestar
- inferiorstar
- infirmstar
- littlestar
- minorstar
- nigglingstar
- nothingstar
- peanutstar
- pettystar
- picayunestar
- piddlingstar
- runtstar
- stuntedstar
- triflingstar
Antonyms
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adj
dangerous
Synonyms
adj
dangerous
- trickystar
- uncertainstar
- unhealthystar
- unsoundstar
- treacherousstar
- hazardousstar
- unsafestar
- precariousstar
- perilousstar
- sensitivestar
- delicatestar
- speculativestar
- diceystar
- chancystar
- endangeredstar
- hairystar
- iffystar
- insecurestar
- long shotstar
- out on a limbstar
Antonyms
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adj
decayed, decaying
Synonyms
adj
decayed, decaying
- putridstar
- rottingstar
- disgustingstar
- rancidstar
- noxiousstar
- sourstar
- spoiledstar
- corruptstar
- moldystar
- stalestar
- badstar
- crumblingstar
- fetidstar
- foulstar
- grossstar
- loathsomestar
- loudstar
- mephiticstar
- noisomestar
- offensivestar
- rankstar
- stinkingstar
- strongstar
- taintedstar
Antonyms
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adj
despicable, inferior, bad
Synonyms
adj
despicable, inferior, bad
- unpleasantstar
- unluckystar
- lousystar
- diseasedstar
- sourstar
- crummystar
- amissstar
- nastystar
- dirtystar
- basestar
- below parstar
- bumstar
- contemptiblestar
- defectivestar
- deplorablestar
- disagreeablestar
- disappointingstar
- dissatisfactorystar
- filthystar
- impairedstar
- inadequatestar
- injuredstar
Antonyms
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adj
silly, meaningless
Synonyms
adj
silly, meaningless
- ludicrousstar
- stupidstar
- illogicalstar
- insignificantstar
- incongruousstar
- unreasonablestar
- ridiculousstar
- absurdstar
- mindlessstar
- pointlessstar
- irrationalstar
- asininestar
- battystar
- crazystar
- daftstar
- double talkstar
- fatuousstar
- flakystar
- foolishstar
- idioticstar
Antonyms
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adj
trembling
Synonyms
adj
trembling
- rockystar
- nervousstar
- insecurestar
- weakstar
- precariousstar
- unstablestar
- wobblystar
- unsettledstar
- jitterystar
- ricketystar
- unsteadystar
- infirmstar
- jerry-builtstar
- rattletrapstar
- shakingstar
- tremulousstar
- unsoundstar
- unsurestar
- vacillatingstar
- waveringstar
Antonyms
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adj
doubtful
Synonyms
adj
doubtful
Antonyms
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adj
not deep
Synonyms
adj
not deep
Antonyms
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adj
misleading
Synonyms
adj
misleading
- incorrectstar
- untruestar
- inaccuratestar
- spuriousstar
- plausiblestar
- erroneousstar
- deceptivestar
- apparentstar
- captiousstar
- crediblestar
- delusivestar
- emptystar
- fallaciousstar
- flatteringstar
- hollowstar
- idlestar
- illogicalstar
- likelystar
- nugatorystar
- ostensiblestar
Antonyms
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adj
dangerous
Synonyms
adj
dangerous
Antonyms
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adj
made up
Synonyms
adj
made up
adj
crazy; mentally disturbed
Synonyms
adj
crazy; mentally disturbed
Antonyms
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adj
irresponsible
Synonyms
adj
irresponsible
- unreliablestar
- bumstar
- capriciousstar
- carelessstar
- changeablestar
- dubiousstar
- erraticstar
- ficklestar
- fly-by-nightstar
- inconsistentstar
- inconstantstar
- indefinitestar
- indeterminatestar
- loosestar
- treacherousstar
- trickstar
Antonyms
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adj
sick
Synonyms
adj
sick
Antonyms
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adj
very bad in effect on well-being
Synonyms
adj
very bad in effect on well-being
- perversestar
- noxiousstar
- dangerousstar
- hazardousstar
- negativestar
- perilousstar
- harmfulstar
- unsoundstar
- degradingstar
- detrimentalstar
- undesirablestar
- corruptstar
- unsanitarystar
- corruptingstar
- poisonousstar
- riskystar
- banefulstar
- chancystar
Antonyms
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adj
not trustworthy, not true
Synonyms
adj
not trustworthy, not true
- trickystar
- uncertainstar
- inaccuratestar
- irresponsiblestar
- treacherousstar
- dubiousstar
- unsoundstar
- ficklestar
- unstablestar
- deceptivestar
- untrustworthystar
- capriciousstar
- undependablestar
- deceitfulstar
- delusivestar
- disreputablestar
- erroneousstar
- fakestar
- falliblestar
- fly-by-nightstar
- furtivestar
- hollowstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
dangerous
Synonyms
adj
dangerous
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
dishonest
Synonyms
adj
dishonest
- incorrectstar
- erroneousstar
- inaccuratestar
- unsoundstar
- spuriousstar
- apocryphalstar
- distortedstar
- mistakenstar
- fictitiousstar
- speciousstar
- wrongstar
- misleadingstar
- untruthfulstar
- deceptivestar
- unfaithfulstar
- cheatingstar
- deceitfulstar
- delusivestar
- deviantstar
- disloyalstar
- faithlessstar
- fallaciousstar
- hollowstar
- inconstantstar
Antonyms
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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adj
stupid, irresponsible
Synonyms
adj
stupid, irresponsible
Antonyms
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adj
lacking, inadequate