abnegator vs abnegate

abnegator is a noun but abnegate is not a noun.

Word	Noun	Adjective	Verb	Adverb
abnegator	Yes	No	No	No
abnegate	No	No	Yes	No

abnegator (noun)	abnegate (noun)
one who gives up or relinquishes or renounces something

abnegator (verb)	abnegate (verb)
	deny or renounce
	surrender (power or a position)
	deny oneself (something); restrain, especially from indulging in some pleasure