prejudice vs partisanship

prejudice and partisanship both are nouns.

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

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

prejudice: a partiality that prevents objective consideration of an issue or situation
partisanship: an inclination to favor one group or view or opinion over alternatives

Other hypernyms of prejudice include partiality.

prejudice (noun)	partisanship (noun)
a partiality that prevents objective consideration of an issue or situation	an inclination to favor one group or view or opinion over alternatives

prejudice (verb)	partisanship (verb)
influence (somebody's) opinion in advance
disadvantage by prejudice