collaborate vs collaborator

collaborate is not a noun while collaborator is a noun.

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

collaborate (noun)	collaborator (noun)
	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

collaborate (verb)	collaborator (verb)
work together on a common enterprise or project
cooperate as a traitor