Unfaithful
Part of speech: adjective
Definition: not having religious faith not keeping good faith; disloyal; not faithful not honest or upright of a translation: incorrect adulterous
Example sentence: America is like an unfaithful love who promises us more than we got.
Faithless
Part of speech: adjective
Definition: Lacking faith; lacking belief in something.Not believing in God, religion, or a comparable ideology.Unfaithful; not of true fidelity; inconstant, as a husband or a wife.Not observant of promises or covenants.Not true to allegiance, duty, or vows; perfidious; treacherous; disloyal.Serving to disappoint or deceive; delusive; unsatisfying.