pro-lifer vs advocate

pro-lifer and advocate both are nouns.

Word	Noun	Adjective	Verb	Adverb
pro-lifer	Yes	No	No	No
advocate	Yes	No	Yes	No

As nouns, advocate is a hypernym of pro-lifer; that is, advocate is a word with a broader meaning than pro-lifer:

pro-lifer: an advocate of full legal protection for embryos and fetuses; someone opposed to legalized induced abortion
advocate: a person who pleads for a cause or propounds an idea

Other hypernyms of pro-lifer include advocator, exponent, proponent.

pro-lifer (noun)	advocate (noun)
an advocate of full legal protection for embryos and fetuses; someone opposed to legalized induced abortion	a person who pleads for a cause or propounds an idea
	a lawyer who pleads cases in court

pro-lifer (verb)	advocate (verb)
	push for something
	speak, plead, or argue in favor of