Thesaurus

invalid

adjective

Synonyms and Antonyms of invalid

  1. chronically or repeatedly suffering from poor health an old and now invalid woman who rarely gets out anymore Synonyms of 1invalid ailing, invalid, weaklyWords Related to 1invalid bedfast, bedridden; delicate, fragile, frail; dying, fading, incurable, moribund; challenged, debilitated, incapacitated, lame; decrepit, enfeebled, feeble, infirm, weak, weakened, worn-out; ill, indisposed, peaked, poorly, run-down, sick, unhealthy, unsound, unwellNear Antonyms of 1invalid able-bodied, fit, hale, hearty, sound, well-conditioned, whole, wholesomeAntonyms of 1invalid healthy, well


invalid

adjective

Synonyms and Antonyms of invalid

  1. 1 having no legal or binding force the treaty is invalid once one side violates it Synonyms of 2invalid bad, inoperative, invalid, nonbinding, nonvalid, nugatory, null and void, voidWords Related to 2invalid illegal; useless, worthless; ineffective, ineffectualNear Antonyms of 2invalid legal; workingAntonyms of 2invalid binding, good, valid

  2. 2 not being in agreement with what is true that's an invalid assumption on your part Synonyms of 2invalid erroneous, inaccurate, incorrect, inexact, invalid, off, unsound, untrue, untruthful, wrongWords Related to 2invalid counterfactual; specious, spurious; deceptive, delusive, delusory, distorted, fallacious, fictitious, illusory, misleading; amiss, askew, awry; deceitful, dishonest, fraudulent, lying, mendacious; unconfirmed, unproven, untested; fabricated, invented, made-up, trumped-upNear Antonyms of 2invalid confirmed, demonstrated, established, proven, tested; faultless, flawless, impeccable, letter-perfect, perfectAntonyms of 2invalid accurate, correct, errorless, exact, factual, precise, proper, right, sound, true, valid, veracious

  3. 3 not using or following good reasoning an argument which has one untrue premise is invalid Synonyms of 2invalid fallacious, illegitimate, inconsequent, inconsequential, invalid, irrational, nonrational, unreasonable, unreasoning, unsound, weakWords Related to 2invalid eristic (also eristical), misleading, sophistic (or sophistical), specious; half-baked, ill-advised, misguided, unconsidered, unreasoned; inconsistent; absurd, asinine, foolish, meaningless, nonsensical, preposterous, reasonless, senseless, silly; Kafkaesque, odd, peculiar, strange, surreal, unusual, weird; insane, mad, nutty, wacky (also whacky); disordered, disorganized, rambling, random; unconvincing; inexplicable, unaccountable, unexplainableNear Antonyms of 2invalid commonsense, sane, sensible, sober, wise; enlightened, informed, just, justified, reasoned; ordered, organized; clear, cogent, compelling, convincing, credible, persuasive, plausible, satisfying, solid; certain, sure, true; confirmed, corroborated, demonstrated, established, substantiated, validatedAntonyms of 2invalid logical, rational, reasonable, sound, valid, well-founded, well-grounded

  4. 4 having no basis in reason or fact an invalid claim that can be easily disproved by the facts Synonyms of 2invalid baseless, foundationless, invalid, nonvalid, unfounded, unreasonable, unsubstantiated, unsupported, unwarrantedWords Related to 2invalid illogical, irrational, nonlogical, unconscionable, unsound; fallacious, false, misled, wrong; gratuitous, uncalled-for, unnecessary; flimsy, implausible, misleading, specious, unconvincing, untenable, weak; ill-advised, unreasoned; inconsistent; absurd, asinine, brainless, crackpot, crazy, fatuous, foolish, half-witted, harebrained, meaningless, nonsensical, preposterous, senseless, silly, simpleminded, stupid, unwise; insane, lunatic, mad, nutty, wacky (also whacky)Near Antonyms of 2invalid certified, validated, verified; confirmed, corroborated; informed, logical, rational; commonsense, sane, sensible, sober, wise; actual, genuine, real, true; certain, sure; clear, cogent, compelling, convincing, credible, persuasive, plausible, satisfying, solid, soundAntonyms of 2invalid good, hard, just, justified, reasonable, reasoned, substantiated, valid, well-founded, well-grounded



Seen and Heard

What made you want to look up invalid? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!