prejudice vs partiality

prejudice and partiality both are nouns.

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

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

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

Other hypernyms of prejudice include partisanship.

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

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