benign vs kind

benign is not a noun while kind is a noun.

Word	Noun	Adjective	Verb	Adverb
benign	No	Yes	No	No
kind	Yes	Yes	No	No

benign (noun)	kind (noun)
	a category of things distinguished by some common characteristic or quality

benign (adjective)	kind (adjective)
pleasant and beneficial in nature or influence	having or showing a tender and considerate and helpful nature; used especially of persons and their behavior
not dangerous to health; not recurrent or progressive (especially of a tumor)	tolerant and forgiving under provocation
kindness of disposition or manner	agreeable, conducive to comfort