loyalist vs protagonist

loyalist and protagonist both are nouns.

Word	Noun	Adjective	Verb	Adverb
loyalist	Yes	No	No	No
protagonist	Yes	No	No	No

As nouns, protagonist is a hypernym of loyalist; that is, protagonist is a word with a broader meaning than loyalist:

loyalist: a person who is loyal to their allegiance (especially in times of revolt)
protagonist: a person who backs a politician or a team etc.

Other hypernyms of loyalist include admirer, booster, champion, friend, supporter.

loyalist (noun)	protagonist (noun)
a person who is loyal to their allegiance (especially in times of revolt)	a person who backs a politician or a team etc.
	the principal character in a work of fiction