advocate vs proponent

advocate and proponent both are nouns.

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

As nouns, advocate and proponent are synonyms defined as:

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

Other synonyms of advocate include advocator, exponent.

advocate (noun)	proponent (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

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