separationist vs advocate

separationist and advocate both are nouns.

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

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

separationist: an advocate of secession or separation from a larger group (such as an established church or a national union)
advocate: a person who pleads for a cause or propounds an idea

Other hypernyms of separationist include advocator, exponent, proponent.

separationist (noun)	advocate (noun)
an advocate of secession or separation from a larger group (such as an established church or a national union)	a person who pleads for a cause or propounds an idea
	a lawyer who pleads cases in court

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