unfairness vs wrongdoing

unfairness and wrongdoing both are nouns.

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

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

Other hypernyms of unfairness include actus reus, misconduct, wrongful conduct.

unfairness (noun)	wrongdoing (noun)
an unjust act	activity that transgresses moral or civil law
injustice by virtue of not conforming with rules or standards	departure from what is ethically acceptable
partiality that is not fair or equitable