acquaintance vs familiarity

acquaintance and familiarity both are nouns.

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

As nouns, acquaintance and familiarity are synonyms defined as:

acquaintance and familiarity: personal knowledge or information about someone or something

Other synonyms of acquaintance include conversance, conversancy.

acquaintance (noun)	familiarity (noun)
personal knowledge or information about someone or something	an act of undue intimacy
a person with whom you are acquainted	usualness by virtue of being familiar or well known
a relationship less intimate than friendship	close or warm friendship
	a casual manner
	personal knowledge or information about someone or something