Synonyms and related words :
Benedict Arnold, Brutus, Judas, Judas Iscariot, Machiavellian, Quisling, archtraitor, behind-the-scenes operator, betrayer, calculator, cockatrice, coconspirator, conniver, conspirator, conspirer, counterplotter, double agent, double-crosser, double-dealer, eminence grise, exploiter, finagler, gamesman, gray eminence, informer, intrigant, intriguer, kingmaker, logroller, maneuverer, manipulator, operator, opportunist, plotter, pork-barrel politician, quisling, rat, schemer, serpent, snake, strategist, tactician, timeserver, traitor, treasonist, trimmer, turncoat, wheeler-dealer, wire-puller