collaborator (n.)
- annalist
- apostate
- author
- authoress
- backslider
- bibliographer
- coauthor
- collaborationist
- columnist
- compiler
- composer
- convert
- copywriter
- critic
- defector
- deserter
- diarist
- dramatist
- encyclopedist
- essayist
- ghost
- ghostwriter
- humorist
- litterateur
- mugwump
- newspaperman
- novelist
- pamphleteer
- poet
- proselyte
- quisling
- recidivist
- recreant
- renegade
- reversionist
- reviewer
- saboteur
- scenarist
- scribe
- scriptwriter
- secessionist
- separatist
- storyteller
- strikebreaker
- subversive
- tergiversator
- traitor
- turnabout
- turncoat
- underground
- wordsmith
- writer