irrational

Synonyms

fallacious, illegitimate, illogical, inconsequent, inconsequential, invalid, nonrational, unreasonable, unreasoning, unsound, weak;

Antonyms

logical, rational, reasonable, sound, valid, well-founded, well-grounded;

Near Antonyms

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, validated;

Related Words

misleading, specious;

half-baked, ill-advised, misguided, unconsidered, unreasoned;

inconsistent;

absurd, asinine, foolish, meaningless, nonsensical, preposterous, reasonless, senseless, silly;

odd, peculiar, strange, surreal, unusual, weird;

insane, mad, nutty, wacky (also whacky);

disordered, disorganized, rambling, random;

unconvincing;

inexplicable, unaccountable, unexplainable;