This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. a person who collaborates

n. An associate in labor, especially in literary or scientific labor.

n. one who willingly cooperates with an enemy, especially an enemy nation occupying one's own country.

n. An associate in labor, especially in literary or scientific work.

n. an associate in an activity or endeavor or sphere of common interest

n. someone who assists in a plot

n. someone who collaborates with an enemy occupying force

"The word "collaborator" might not be the first one that comes to mind as an attribute for an agency of the year, much less one that is owned by the French, but it has proved to be one of the strongest qualities differentiating MPG from the rest of..."

accessory    accessary    treasonist    traitor   

confidant    informant    contributor    mentor    colleague