advocator vs actor

advocator and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
advocator	Yes	No	No	No
actor	Yes	No	No	No

As nouns, actor is a hypernym of advocator; that is, actor is a word with a broader meaning than advocator:

Other hypernyms of advocator include doer, worker.

advocator (noun)	actor (noun)
a person who pleads for a cause or propounds an idea	a theatrical performer
	a person who acts and gets things done