Synonyms and Antonyms of rational
1
having the ability to reason
- human beings are rational creatures
analytic (or analytical), logical
brainy, cerebral, highbrow, highbrowed, intellectual
cognitional, cognitive, mental
levelheaded, practical, sane, sensible, sober
brainless, dense, doltish, dopey (also dopy), dorky [slang], dull, dumb, fatuous, half-witted, mindless, obtuse, senseless, slow, stupid, thickheaded
fallacious, groundless, illogical, invalid, nonsensical
2
according to the rules of logic
- insisted there was a rational explanation for the strange creaking noises and that there were no such things as ghosts
analytic (or analytical), coherent, consequent, good, logical, reasonable, sensible, sound, valid, well-founded, well-grounded
casuistic (or casuistical), eristic (also eristical), fallacious, misleading, sophistic (or sophistical), specious
unarticulated
unscientific
absurd, cockeyed, crazy, daffy, fatuous, half-baked, half-witted, harebrained, insane, loony (also looney), mad, nonsensical, nutty, preposterous, simpleminded, stupid, weak-minded, witless
senseless, thoughtless
uncompelling, unconvincing
3
based on sound reasoning or information
- betting all of your savings on the lottery is not a rational move
commonsense, commonsensible, commonsensical, firm, good, hard, informed, just, justified, levelheaded, logical, reasonable, reasoned, sensible, sober, solid, valid, well-founded
actual, real, true
certain, sure
certified, validated, verified
confirmed, corroborated, substantiated
cogent, convincing
colorable, credible, plausible
