Synonyms: deserter, turncoat, apostate, ratter, recreant, renegade
Definition: a disloyal person who betrays or deserts his cause or religion or political party or friend etc.
Similar words: quitter
Definition: a person who gives up too easily
Synonyms: apostate
Definition: not faithful to religion or party or cause
Similar words: unfaithful
Definition: not true to duty or obligation or promises
Usage: an unfaithful lover