ethnocentrism vs partisanship

ethnocentrism and partisanship both are nouns.

Word	Noun	Adjective	Verb	Adverb
ethnocentrism	Yes	No	No	No
partisanship	Yes	No	No	No

As nouns, partisanship is a hypernym of ethnocentrism; that is, partisanship is a word with a broader meaning than ethnocentrism:

ethnocentrism: belief in the superiority of one's own ethnic group
partisanship: an inclination to favor one group or view or opinion over alternatives

Other hypernyms of ethnocentrism include partiality.

ethnocentrism (noun)	partisanship (noun)
belief in the superiority of one's own ethnic group	an inclination to favor one group or view or opinion over alternatives