reasoning vs rational

reasoning and rational both are nouns.

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

reasoning (noun)	rational (noun)
thinking that is coherent and logical	an integer or a fraction

reasoning (adjective)	rational (adjective)
endowed with the capacity to reason	consistent with or based on or using 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