partisan vs protagonist

partisan and protagonist both are nouns.

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

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

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

partisan (noun)	protagonist (noun)
a pike with a long tapering double-edged blade with lateral projections; 16th and 17th centuries	a person who backs a politician or a team etc.
a fervent and even militant proponent of something	the principal character in a work of fiction
an ardent and enthusiastic supporter of some person or activity

partisan (adjective)	protagonist (adjective)
devoted to a cause or party