Judas

1. (n.) The disciple who betrayed Christ. Hence: A treacherous person; one who betrays under the semblance of friendship.

2. (a.) Treacherous; betraying.

Thesaurus Entries

Benedict Arnold, Brutus, Judas Iscariot, Quisling, archtraitor, betrayer, cockatrice, conniver, conspirator, conspirer, convict, criminal, crook, deceiver, desperado, desperate criminal, double agent, double-crosser, double-dealer, felon, fugitive, gallows bird, gangster, gaolbird, informer, intrigant, intriguer, jailbird, lawbreaker, machinator, mobster, outlaw, plotter, public enemy, quisling, racketeer, rat, schemer, scofflaw, serpent, snake, swindler, thief, thug, timeserver, traitor, treasonist, trimmer, turncoat, two-timer