intimacy vs affaire

intimacy and affaire both are nouns.

Word	Noun	Adjective	Verb	Adverb
intimacy	Yes	No	No	No
affaire	Yes	No	No	No

As nouns, intimacy and affaire are synonyms defined as:

intimacy and affaire: a usually secretive or illicit sexual relationship

Other synonyms of intimacy include affair, amour, involvement, liaison.

intimacy (noun)	affaire (noun)
close or warm friendship	a usually secretive or illicit sexual relationship
a feeling of being intimate and belonging together
a usually secretive or illicit sexual relationship