unfaithful vs cheating

unfaithful is not a noun while cheating is a noun.

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

unfaithful (noun)	cheating (noun)
	a deception for profit to yourself

unfaithful (adjective)	cheating (adjective)
not true to duty or obligation or promises	violating accepted standards or rules
having sexual relations with someone other than your husband or wife, or your boyfriend or girlfriend	not faithful to a spouse or lover
having the character of, or characteristic of, a traitor
not trustworthy