loyalist vs champion

loyalist and champion both are nouns.

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

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

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

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

loyalist (noun)	champion (noun)
a person who is loyal to their allegiance (especially in times of revolt)	someone who fights for a cause
	someone who has won first place in a competition
	a person who backs a politician or a team etc.
	someone who is dazzlingly skilled in any field

loyalist (adjective)	champion (adjective)
	holding first place in a contest

loyalist (verb)	champion (verb)
	protect or fight for as a champion