advocator vs doer

advocator and doer both are nouns.

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

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

Other hypernyms of advocator include actor, worker.

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