collaborator
(noun)
noun
1. someone who assists in a plot
Similar word(s): confederate, henchman
Definition categories: person, accessary, accessory
2. someone who collaborates with an enemy occupying force
Similar word(s): collaborationist, quisling
Definition categories: person, traitor, treasonist
3. an associate in an activity or endeavor or sphere of common interest
- the musician and the librettist were collaborators
Similar word(s): cooperator, pardner, partner