consistent vs rational

consistent is not a noun while rational is a noun.

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

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

consistent (adjective)	rational (adjective)
(sometimes followed by `with') in agreement or consistent or reliable	consistent with or based on or using reason
marked by an orderly, logical, and aesthetically consistent relation of parts	capable of being expressed as a quotient of integers
capable of being reproduced	having its source in or being guided by the intellect (as distinguished from experience or emotion)
the same throughout in structure or composition	of or associated with or requiring the use of the mind