civil rights leader vs reformer

civil rights leader and reformer both are nouns.

Word	Noun	Adjective	Verb	Adverb
civil rights leader	Yes	No	No	No
reformer	Yes	No	No	No

As nouns, reformer is a hypernym of civil rights leader; that is, reformer is a word with a broader meaning than civil rights leader:

civil rights leader: a leader of the political movement dedicated to securing equal opportunity for members of minority groups
reformer: a disputant who advocates reform

Other hypernyms of civil rights leader include crusader, meliorist, reformist, social reformer.

civil rights leader (noun)	reformer (noun)
a leader of the political movement dedicated to securing equal opportunity for members of minority groups	an apparatus that reforms the molecular structure of hydrocarbons to produce richer fuel
	a disputant who advocates reform