impersonator vs impersonate

impersonator is a noun but impersonate is not a noun.

Word	Noun	Adjective	Verb	Adverb
impersonator	Yes	No	No	No
impersonate	No	No	Yes	No

impersonator (noun)	impersonate (noun)
someone who (fraudulently) assumes the appearance of another

impersonator (verb)	impersonate (verb)
	pretend to be someone you are not; sometimes with fraudulent intentions
	represent another person with comic intentions
	assume or act the character of