familiarity vs conversance

familiarity and conversance both are nouns.

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

As nouns, familiarity and conversance are synonyms defined as:

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

Other synonyms of familiarity include acquaintance, conversancy.

familiarity (noun)	conversance (noun)
an act of undue intimacy	personal knowledge or information about someone or something
usualness by virtue of being familiar or well known
close or warm friendship
a casual manner
personal knowledge or information about someone or something