apostate vs unfaithful

apostate is a noun but unfaithful is not a noun.

Word	Noun	Adjective	Verb	Adverb
apostate	Yes	Yes	No	No
unfaithful	No	Yes	No	No

apostate (noun)	unfaithful (noun)
a disloyal person who betrays or deserts his cause or religion or political party or friend etc.

apostate (adjective)	unfaithful (adjective)
not faithful to religion or party or cause	not true to duty or obligation or promises
	having sexual relations with someone other than your husband or wife, or your boyfriend or girlfriend
	having the character of, or characteristic of, a traitor
	not trustworthy