familiarity vs conversancy

familiarity and conversancy both are nouns.

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

As nouns, familiarity and conversancy are synonyms defined as:

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

Other synonyms of familiarity include acquaintance, conversance.

familiarity (noun)	conversancy (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