commentate vs commentator

commentate is not a noun while commentator is a noun.

Word	Noun	Adjective	Verb	Adverb
commentate	No	No	Yes	No
commentator	Yes	No	No	No

commentate (noun)	commentator (noun)
	a writer who reports and analyzes events of the day
	an expert who observes and comments on something

commentate (verb)	commentator (verb)
serve as a commentator, as in sportscasting
make a commentary on