unfaithful vs treacherous

unfaithful and treacherous both are adjectives.

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

unfaithful (adjective)	treacherous (adjective)
not true to duty or obligation or promises	dangerously unstable and unpredictable
having sexual relations with someone other than your husband or wife, or your boyfriend or girlfriend	tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans
having the character of, or characteristic of, a traitor
not trustworthy