Antonyms for rational

Antonyms

adj. · sane

irrational, non-rational, insane, absurd, unreasonable, unreasoning, unintelligent, arbitrary, nonsensical, dense, dull, dull-witted, half-brained, slow-witted, mawkish, barmy dated, ludicrous, hysterical, delirious, superstitious, preposterous, quixotic, crazy, asinine, mystical

adj.

thick, arational, purblind formal, lumpish

Synonyms

sane, intelligent, intellectual

All synonyms for rational →

In other languages

Français

raisonnable