W: (n) rationality [Related to: rational] (the state of having good sense and sound judgment) "his rationality may have been impaired"; "he had to rely less on reason than on rousing their emotions"
S: (adj) intellectual, rational, noetic (of or associated with or requiring the use of the mind) "intellectual problems"; "the triumph of the rational over the animal side of man"
S: (adj) rational (capable of being expressed as a quotient of integers) "rational numbers"
S: (adj) rational (having its source in or being guided by the intellect (as distinguished from experience or emotion)) "a rational analysis"