libertarian vs advocate

libertarian and advocate both are nouns.

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

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

Other hypernyms of libertarian include advocator, exponent, proponent.

libertarian (noun)	advocate (noun)
someone who believes the doctrine of free will	a person who pleads for a cause or propounds an idea
an advocate of libertarianism	a lawyer who pleads cases in court

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