Synonyms and Antonyms of rational
1 having the ability to reason human beings are rational creatures Synonyms of rational intelligent, reasonable, reasoning, thinking Words Related to rational analytic (or analytical), logical; brainy, cerebral, highbrow, highbrowed, intellectual; cognitional, cognitive, mental; levelheaded, practical, sane, sensible, sober Near Antonyms of rational brainless, dense, doltish, dopey (also dopy), dorky [slang], dull, dumb, fatuous, half-witted, mindless, obtuse, senseless, slow, stupid, thickheaded; fallacious, groundless, illogical, invalid, nonsensical Antonyms of rational irrational, nonrational, nonthinking, unintelligent, unreasonable, unreasoning, unthinking
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 Synonyms of rational analytic (or analytical), coherent, consequent, good, logical, reasonable, sensible, sound, valid, well-founded, well-groundedWords Related to rational a posteriori, a priori, syllogistic; cognitive, empirical (also empiric); defendable, defensible, justifiable, maintainable, supportable, sustainable, tenableNear Antonyms of rational 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, unconvincingAntonyms of rational illegitimate, illogical, incoherent, inconsequent, inconsequential, invalid, irrational, unreasonable, unsound, weak
3 based on sound reasoning or information betting all of your savings on the lottery is not a rational move Synonyms of rational commonsense, commonsensible, commonsensical, firm, hard, informed, just, justified, levelheaded, logical, good, reasonable, reasoned, sensible, sober, solid, valid, well-foundedWords Related to rational actual, real, true; certain, sure; certified, validated, verified; confirmed, corroborated, substantiated; cogent, convincing; colorable, credible, plausibleNear Antonyms of rational unsubstantiated, unsupported, unwarranted; flimsy, implausible, unconvincing, weak; fallacious, false, misguided, misledAntonyms of rational groundless, illogical, invalid, irrational, nonrational, nonsensical, nonvalid, unfounded, uninformed, unjustified, unreasonable, unreasoned, unsound
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