unfairness vs partiality

unfairness and partiality both are nouns.

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

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

unfairness: partiality that is not fair or equitable
partiality: an inclination to favor one group or view or opinion over alternatives

Other hypernyms of unfairness include partisanship.

unfairness (noun)	partiality (noun)
an unjust act	an inclination to favor one group or view or opinion over alternatives
injustice by virtue of not conforming with rules or standards	a predisposition to like something
partiality that is not fair or equitable