disloyal
Sabbath-breaker
apostate
apostatize
atheist
atheistic
backslider
backsliding
blasphemer
blasphemous
bolter
changeling
collaborationist
collaborative
collaborator
convert
defect
defector
degenerate
desert
deserter
faithless
fallen
fallen from grace
fifth columnist
heretic
heretical
iconoclast
impious
insurgent
irreligious
irreverent
lapsed
mugwump
perfidious
profanatory
profane
proselyte
quisling
rat
rebel
recidivist
recidivistic
recreant
renegado
renegate
dissent
protest
quitter
resist
black-robed
blackguard
burly
charlatan
coward
full-fledged
hypocrite
impostor
interloper
junior
one-eyed
outlaw
rascal
redheaded
rogue
schemer
swindler
traitor
undead
vagabond
villain
would-be