affaire vs intimacy

affaire and intimacy both are nouns.

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

As nouns, affaire and intimacy are synonyms defined as:

affaire and intimacy: a usually secretive or illicit sexual relationship

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

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