sane vs rational

sane is not a noun while rational is a noun.

Word	Noun	Adjective	Verb	Adverb
sane	No	Yes	No	No
rational	Yes	Yes	No	No

sane (noun)	rational (noun)
	an integer or a fraction

sane (adjective)	rational (adjective)
mentally healthy; free from mental disorder	consistent with or based on or using reason
marked by sound judgment; having good reason	capable of being expressed as a quotient of integers
	having its source in or being guided by the intellect (as distinguished from experience or emotion)
	of or associated with or requiring the use of the mind