familiarity vs familiar

familiarity and familiar both are nouns.

Word	Noun	Adjective	Verb	Adverb
familiarity	Yes	No	No	No
familiar	Yes	Yes	No	No

familiarity (noun)	familiar (noun)
an act of undue intimacy	a spirit (usually in animal form) that acts as an assistant to a witch or wizard
usualness by virtue of being familiar or well known	a person attached to the household of a high official (as a pope or bishop) who renders service in return for support
close or warm friendship	a friend who is frequently in the company of another
a casual manner
personal knowledge or information about someone or something

familiarity (adjective)	familiar (adjective)
	well known or easily recognized
	within normal everyday experience; common and ordinary; not strange
	having mutual interests or affections; of established friendship
	(usually followed by `with') well informed about or knowing thoroughly