kindred vs similar

kindred is a noun but similar is not a noun.

Word	Noun	Adjective	Verb	Adverb
kindred	Yes	Yes	No	No
similar	No	Yes	No	No

kindred (noun)	similar (noun)
group of people related by blood or marriage

kindred (adjective)	similar (adjective)
related by blood or marriage	marked by correspondence or resemblance
similar in quality or character	resembling or similar; having the same or some of the same characteristics; often used in combination
	having the same or similar characteristics
	capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability
	(of words) expressing closely related meanings