fanatic vs partisan

fanatic and partisan both are nouns.

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

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

Other hypernyms of fanatic include enthusiast, partizan.

fanatic (noun)	partisan (noun)
a person motivated by irrational enthusiasm (as for a cause)	a pike with a long tapering double-edged blade with lateral projections; 16th and 17th centuries
	a fervent and even militant proponent of something
	an ardent and enthusiastic supporter of some person or activity

fanatic (adjective)	partisan (adjective)
marked by excessive enthusiasm for and intense devotion to a cause or idea	devoted to a cause or party