treasonist

Brutus Judas backstabber betrayer defector deserter double agent double-crosser fink informer quisling snake in the grass snitch spy stool pigeon turncoat

conspirator deserter hypocrite impostor informer renegade spy turncoat

Judas apostate backslider betrayer deceiver defector double-crosser fink intriguer miscreant quisling rebel snake sneak snitch snitcher squealer tattletale traducer two-timer whistle-blower wolf

Benedict Arnold back-stabber stool pigeon

loyalist

defector informer

Judas apostate betrayer conspirator deceiver deserter double-crosser fink quisling rat rebel renegade snake sneak snitch spy squealer tattletale tergiversator two-timer whistle-blower

Benedict Arnold back-stabber stool pigeon

adherent