quisling (n.)
- apostate
- backslider
- betrayer
- cockatrice
- collaborationist
- collaborator
- conspirator
- convert
- convict
- criminal
- crook
- deceiver
- defector
- deserter
- desperado
- double-crosser
- double-crossing
- double-dealer
- felon
- fugitive
- gangster
- gaolbird
- informer
- intriguer
- jailbird
- lawbreaker
- machinator
- mobster
- mugwump
- outlaw
- plotter
- proselyte
- racketeer
- rat
- recidivist
- recreant
- renegade
- reversionist
- schemer
- scofflaw
- secessionist
- separatist
- serpent
- snake
- strikebreaker
- swindler
- tergiversator
- thief
- thug
- timeserver
- traitor
- treasonist
- trimmer
- turnabout
- turncoat
- two-timer
