familiarity vs unfamiliarity

familiarity and unfamiliarity both are nouns.

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

familiarity (noun)	unfamiliarity (noun)
an act of undue intimacy	unusualness as a consequence of not being well known
usualness by virtue of being familiar or well known
close or warm friendship
a casual manner
personal knowledge or information about someone or something