treachery

Synonyms: betrayal bunco corruption dirty dealing dirty pool dirty trick dirty work disaffection dodge double-cross double-dealing duplicity faithlessness fake falseness fast shuffle flimflam grift gyp infidelity perfidiousness perfidy put-on racket recreancy scam sellout shell game skin game spoof stab in the back sweet talk treacherousness treason two-timing whitewash

Antonyms: constancy devotion faithfulness fidelity honesty love loyalty