partiality vs partisanship

partiality and partisanship both are nouns.

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

As nouns, partiality and partisanship are synonyms defined as:

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

partiality (noun)	partisanship (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