Synonyms of rational in English:

rational


See definition of rational

adjective

1‘a rational approach to the problem’

SYNONYMS
logical, reasoned, well reasoned, sensible, reasonable, cogent, coherent, intelligent, wise, judicious, sagacious, astute, shrewd, perceptive, enlightened, clear-eyed, clear-sighted, commonsensical, common-sense, well advised, well grounded, sound, sober, prudent, circumspect, politic
down-to-earth, practical, pragmatic, matter-of-fact, hard-headed, with both one's feet on the ground, unidealistic
informal joined-up
ANTONYMS

irrational, illogical

2‘she was not fully rational at the time of signing the agreement’

SYNONYMS
lucid, coherent, sane, in one's right mind, able to reason clearly, able to think clearly, of sound mind, in possession of all one's faculties
normal, balanced, well balanced, clear-headed
compos mentis
informal all there
ANTONYMS

insane

3‘man is a self-conscious, rational being’

SYNONYMS
intelligent, thinking, discriminating, reasoning
cognitive, mental, cerebral, logical, analytical, conceptual
rare ratiocinative