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illogical - 20 thesaurus results
| Main Entry: | illogical |
| Part of Speech: | adjective |
| Definition: | not making sense |
| Synonyms: | absurd, cockeyed*, fallacious, false, fatuous, faulty, groundless, hollow, implausible, inconclusive, incongruous, inconsistent, incorrect, invalid, irrational, irrelevant, mad, meaningless, nutty*, off the wall, preposterous, screwy*, senseless, specious, spurious, unconnected, unreasonable, unscientific, unsound, unsubstantial, untenable, wacky, casuistic, inconsequent, not following, self-contradictory, sophistic, sophistical, unproved, without basis, without foundation |
| Antonyms: | correct, logical, meaningful, rational, reasonable, right, sensible |
* = informal/non-formal usage
| Main Entry: | absurd |
| Part of Speech: | adjective |
| Definition: | ridiculous, senseless |
| Synonyms: | batty, crazy, daffy, flaky*, foolish, goofy*, idiotic, illogical, inane, incongruous, irrational, laughable, loony, ludicrous, nonsensical, nutty, off the wall, preposterous, sappy*, screwy*, silly, stupid, unreasonable, wacky, campy, dippy, fooling around, for grins, freaky, gagged up, jokey, joshing, tomfool |
| Antonyms: | certain, logical, rational, reasonable, sensible, wise |
* = informal/non-formal usage
| Main Entry: | disconnected |
| Part of Speech: | adjective |
| Definition: | confused; discontinuous |
| Synonyms: | broken, detached, disjointed, disordered, illogical, inchoate, incoherent, interrupted, irrational, irregular, jumbled, loose, mixed-up, muddled, rambling, separated, uncoordinated, unintelligible, wandering, garbled, incohesive, uncontinuous |
| Antonyms: | coherent, connected, continuous, intelligible, joined, understandable, attached |
| Main Entry: | fallacious |
| Part of Speech: | adjective |
| Definition: | false, wrong |
| Synonyms: | deceptive, delusive, erroneous, fictitious, fishy*, fraudulent, illogical, illusory, incorrect, invalid, irrational, mad, misleading, mistaken, off*, phony, spurious, unfounded, unreal, unreasonable, unsound, untrue, beguiling, deceiving, deluding, delusory, reasonless, sophistic, sophistical, ungrounded, unreasoned, way off |
| Notes: | fallacious means intended to deceive; fallible means liable to make a mistake or to be inaccurate or erroneous; false means not in accordance with the fact or reality or actuality, or deliberately deceptive, or not genuine or real |
| Antonyms: | correct, real, true, truthful |
* = informal/non-formal usage
| Main Entry: | far-fetched |
| Part of Speech: | adjective |
| Definition: | hard to believe |
| Synonyms: | bizarre, doubtful, dubious, eccentric, fantastic, fishy*, forced, illogical, implausible, improbable, incoherent, inconsequential, incredible, labored, preposterous, queer, recondite, strained, strange, suspicious, unbelievable, unconvincing, unlikely, unnatural, unrealistic, hard to swallow |
| Antonyms: | believable, natural, plausible, realistic |
* = informal/non-formal usage
| Main Entry: | groundless |
| Part of Speech: | adjective |
| Definition: | without reason, justification |
| Synonyms: | baseless, bottomless, chimerical, empty, false, flimsy, gratuitous, idle, illogical, illusory, imaginary, unauthorized, uncalled-for, unfounded, unjustified, unwarranted, causeless, foundationless, unprovoked, unsupported |
| Antonyms: | reasonable, warranted, called-for, grounded, justified, proven |
| Main Entry: | impractical/impracticable |
| Part of Speech: | adjective |
| Definition: | unrealistic |
| Synonyms: | abstract, absurd, chimerical, idealistic, illogical, impossible, impracticable, improbable, inapplicable, inefficacious, infeasible, inoperable, irrealizable, ivory-tower, no-go, nonfunctional, nonviable, not a prayer, otherworldly, out of the question, quixotic, romantic, speculative, starry-eyed*, theoretical, unattainable, unbusinesslike, unfeasible, unreal, unserviceable, unusable, unwise, unworkable, useless, visionary, wild, won't fly |
| Antonyms: | practicable, practical, probable, realistic, reasonable, tenable, viable |
* = informal/non-formal usage
| Main Entry: | inane |
| Part of Speech: | adjective |
| Definition: | stupid |
| Synonyms: | absurd, asinine, daft, empty, fatuous, flat, foolish, frivolous, futile, harebrained*, idiotic, illogical, innocuous, insipid, jejune, laughable, meaningless, mindless, pointless, puerile, ridiculous, sappy*, senseless, silly, trifling, unintelligent, vacant, vacuous, vain, vapid, weak, wishy-washy*, worthless, imbecilic |
| Antonyms: | bright, intelligent, smart |
* = informal/non-formal usage
| Main Entry: | incongruous |
| Part of Speech: | adjective |
| Definition: | out of place; absurd |
| Synonyms: | alien, bizarre, conflicting, contradictory, discordant, disparate, distorted, divergent, extraneous, fantastic, fitful, foreign, illogical, improper, inappropriate, inapt, incoherent, incompatible, inconsistent, irreconcilable, irregular, jumbled, lopsided, rambling, twisted, unavailing, unbalanced, unbecoming, unconnected, uncoordinated, uneven, unintelligible, unpredictable, unrelated, unsuitable, unsuited, disconsonant, inapropos, incongruent, mismatched, out of keeping, shifting |
| Antonyms: | compatible, congruous, consistent, corresponding, fitting, harmonious, matched, suitable, uniform |
| Main Entry: | inconsistent |
| Part of Speech: | adjective |
| Definition: | contradictory, irregular |
| Synonyms: | capricious, changeable, conflicting, contrary, discordant, discrepant, dissonant, erratic, fickle, illogical, incoherent, incompatible, incongruous, inconstant, irreconcilable, mercurial, temperamental, uncertain, unpredictable, unstable, variable, warring, at odds, at variance, in conflict, incongruent, lubricious, out of step |
| Antonyms: | consistent, consonant, regular, steady, unchanging |
| Main Entry: | mistaken |
| Part of Speech: | adjective |
| Definition: | wrong, incorrect |
| Synonyms: | at fault, confounded, confused, deceived, deluded, erroneous, fallacious, false, faulty, fooled, ill-advised, illogical, inaccurate, inappropriate, misguided, misled, misunderstanding, off base*, unadvised, unfounded, unreal, unsound, untrue, warranted, all wet, barking up wrong tree, confused with, duped, misconstrued, misinformed, misinterpreting, misjudging, off track, tricked, under wrong impression, way off, wide of mark, wrong number, wrongly identified |
| Antonyms: | correct, exact, fair, just, precise, right, sound, true |
* = informal/non-formal usage
| Main Entry: | sappy |
| Part of Speech: | adjective |
| Definition: | foolish, sentimental |
| Synonyms: | absurd, balmy, crazy*, idiotic, illogical, insane, loony*, maudlin, mushy*, preposterous, silly, sticky*, stupid, bathetic, drippy, slushy, soppy |
| Antonyms: | realistic, serious |
* = informal/non-formal usage
| Main Entry: | scatterbrained |
| Part of Speech: | adjective |
| Definition: | not thinking clearly |
| Synonyms: | careless, dizzy, empty-headed*, featherbrained*, flighty, forgetful, frivolous, giddy, harebrained*, illogical, inattentive, irrational, irresponsible, madcap, silly, slaphappy*, stupid, thoughtless, birdbrained |
| Antonyms: | aware, careful, sensible, thoughtful |
* = informal/non-formal usage
| Main Entry: | senseless |
| Part of Speech: | adjective |
| Definition: | silly, meaningless |
| Synonyms: | absurd, asinine, batty, crazy, daft, double talk, fatuous, flaky, foolish, idiotic, illogical, inane, incongruous, inconsistent, insignificant, irrational, ludicrous, mad, mindless, moronic, nonsensical, nutty, pointless, purposeless, ridiculous, simple, stupid, trivial, unimportant, unintelligent, unreasonable, unsound, unwise, wacky*, doublespeak, imbecilic, purportless, unmeaning, without rhyme or reason |
| Antonyms: | feeling, intelligent, rational, reasonable, sensible, wise |
* = informal/non-formal usage
| Main Entry: | silly |
| Part of Speech: | adjective |
| Definition: | absurd, giddy, foolish |
| Synonyms: | asinine, balmy, brainless, childish, crazy, dizzy*, empty, empty-headed*, fatuous, featherbrained*, flighty, foolhardy, frivolous, harebrained*, idiotic, ignorant, illogical, immature, imprudent, inane, inappropriate, inconsistent, irrational, irresponsible, ludicrous, meaningless, nonsensical, pointless, preposterous, puerile, ridiculous, senseless, simple, simpleminded, stupid, unintelligent, unreasonable, unwise, vacuous, witless, dippy, muddle-headed, nitwitted, sheepheaded |
| Antonyms: | mature, mundane, practical, sensible, serious, wise |
* = informal/non-formal usage
| Main Entry: | specious |
| Part of Speech: | adjective |
| Definition: | misleading |
| Synonyms: | apparent, captious, credible, deceptive, delusive, empty, erroneous, fallacious, false, flattering, hollow, idle, illogical, inaccurate, incorrect, likely, nugatory, ostensible, ostentatious, plausible, presumable, presumptive, pretentious, probable, seeming, sophisticated, spurious, unsound, untrue, vain, wrong, apparently right, beguiling, casuistic, colorable, sophistic, sophistical |
| Antonyms: | real, true, valid |
| Main Entry: | unfounded |
| Part of Speech: | adjective |
| Definition: | not based on fact |
| Synonyms: | baseless, bottomless, deceptive, fallacious, false, gratuitous, groundless, idle, illogical, mendacious, misleading, spurious, trumped up*, uncalled-for, unjustified, unreal, unsubstantiated, untrue, untruthful, unwarranted, vain, fabricated, foundationless, off-base, unproven, without basis, without foundation |
| Antonyms: | founded, supported, justified, proven, substantiated |
* = informal/non-formal usage
| Main Entry: | unsound |
| Part of Speech: | adjective |
| Definition: | not well; flimsy |
| Synonyms: | ailing, crazed, dangerous, decrepit, defective, delicate, demented, deranged, diseased, erroneous, fallacious, false, faulty, fragile, frail, ill, illogical, inaccurate, incongruous, incorrect, infirm, insane, insecure, insubstantial, invalid, lunatic, mad, rickety, shaky, specious, unbalanced, unhealthy, unhinged, unreliable, unsafe, unstable, unsteady, unsubstantial, unwell, weak, wobbly, flawed, in poor health, not solid, tottering, unbacked |
| Antonyms: | safe, sound, stable, strong, well |
| Main Entry: | unthinkable |
| Part of Speech: | adjective |
| Definition: | incredible, unusual |
| Synonyms: | absurd, exceptional, extraordinary, illogical, implausible, impossible, improbable, inconceivable, out of the question, outlandish, preposterous, rare, singular, unbelievable, uncommon, unimaginable, unique, unlikely, unreasonable, beyond belief, beyond possibility, incogitable, insupportable, unordinary |
| Antonyms: | believable, conceivable, credible |
| Main Entry: | farfetched |
| Part of Speech: | adjective |
| Definition: | unbelieveable |
| Synonyms: | bizarre, doubtful, dubious, eccentric, fantastic, fishy, forced, illogical, implausible, improbable, incoherent, inconsequential, incredible, labored, preposterous, queer, recondite, strained, strange, suspicious, unconvincing, unlikely, unnatural, unrealistic |
| Antonyms: | believable, likely, plausible, realistic |
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009, Dictionary.com, LLC. All rights reserved.

