Antonyms of adj nonrational

2 senses of nonrational

Sense 1
nonrational -- (not based on reason; "there is a great deal that is nonrational in modern culture")

INDIRECT (VIA irrational) -> rational -- (consistent with or based on or using reason; "rational behavior"; "a process of rational inference"; "rational thought")

Sense 2
intuitive, nonrational, visceral -- (obtained through intuition rather than from reasoning or observation)

INDIRECT (VIA illogical) -> logical -- (capable of or reflecting the capability for correct and valid reasoning; "a logical mind")

Similarity of adj nonrational

2 senses of nonrational

Sense 1
nonrational -- (not based on reason; "there is a great deal that is nonrational in modern culture")
       => irrational (vs. rational) -- (not consistent with or using reason; "irrational fears"; "irrational animals")

Sense 2
intuitive, nonrational, visceral -- (obtained through intuition rather than from reasoning or observation)
       => illogical (vs. logical), unlogical -- (lacking in correct logical relation)