rational vs intelligent

rational is a noun but intelligent is not a noun.

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

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

rational (adjective)	intelligent (adjective)
consistent with or based on or using reason	having the capacity for thought and reason especially to a high degree
capable of being expressed as a quotient of integers	endowed with the capacity to reason
having its source in or being guided by the intellect (as distinguished from experience or emotion)	exercising or showing good judgment
of or associated with or requiring the use of the mind	possessing sound knowledge