cheerleader vs protagonist

cheerleader and protagonist both are nouns.

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

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

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

cheerleader (noun)	protagonist (noun)
someone who leads the cheers by spectators at a sporting event	a person who backs a politician or a team etc.
an enthusiastic and vocal supporter	the principal character in a work of fiction