collaborationist vs collaborator

collaborationist and collaborator both are nouns.

Word	Noun	Adjective	Verb	Adverb
collaborationist	Yes	No	No	No
collaborator	Yes	No	No	No

As nouns, collaborationist and collaborator are synonyms defined as:

collaborationist and collaborator: someone who collaborates with an enemy occupying force

Other synonyms of collaborationist include quisling.

collaborationist (noun)	collaborator (noun)
someone who collaborates with an enemy occupying force	an associate in an activity or endeavor or sphere of common interest
	someone who collaborates with an enemy occupying force
	someone who assists in a plot