recidivist (n.)

• apostate
• atheist
• backslider
• backsliding
• blasphemer
• collaborationist
• collaborator
• convert
• defector
• degenerate
• deserter
• erring
• frail
• lecher
• miscreant
• mugwump
• pervert
• pimp
• prodigal
• profligate
• proselyte
• quisling
• reactionary
• recessive
• recreant
• renegade
• repeater
• reprobate
• reversible
• reversioner
• reversionist
• scapegrace
• secessionist
• separatist
• strikebreaker
• tergiversator
• traitor
• trollop
• turnabout
• turncoat
• wanton
• weak
• whore