partisanship vs partiality

partisanship and partiality both are nouns.

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

As nouns, partisanship and partiality are synonyms defined as:

partisanship and partiality: an inclination to favor one group or view or opinion over alternatives

partisanship (noun)	partiality (noun)
an inclination to favor one group or view or opinion over alternatives	an inclination to favor one group or view or opinion over alternatives
	a predisposition to like something