advocator vs advocate

advocator and advocate both are nouns.

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

As nouns, advocator and advocate are synonyms defined as:

advocator and advocate: a person who pleads for a cause or propounds an idea

Other synonyms of advocator include exponent, proponent.

advocator (noun)	advocate (noun)
a person who pleads for a cause or propounds an idea	a person who pleads for a cause or propounds an idea
	a lawyer who pleads cases in court

advocator (verb)	advocate (verb)
	push for something
	speak, plead, or argue in favor of