arrogator vs arrogate

arrogator is a noun but arrogate is not a noun.

Word	Noun	Adjective	Verb	Adverb
arrogator	Yes	No	No	No
arrogate	No	No	Yes	No

arrogator (noun)	arrogate (noun)
a person who through conceit makes pretentious claims to rights or advantages that he or she is not entitled to or to qualities that he or she does not possess

arrogator (verb)	arrogate (verb)
	seize and take control without authority and possibly with force; take as one's right or possession
	make undue claims to having
	demand as being one's due or property; assert one's right or title to