idolater vs gentile

idolater and gentile both are nouns.

Word	Noun	Adjective	Verb	Adverb
idolater	Yes	No	No	No
gentile	Yes	Yes	No	No

As nouns, gentile is a hypernym of idolater; that is, gentile is a word with a broader meaning than idolater:

Other hypernyms of idolater include heathen, infidel, pagan.

idolater (noun)	gentile (noun)
a person who worships idols	a Christian as contrasted with a Jew
	a person who does not acknowledge your god
	a person who is not a member of one's own religion; used in this sense by Mormons and Hindus
	a Christian

idolater (adjective)	gentile (adjective)
	belonging to or characteristic of non-Jewish peoples