iniquity vs unfairness

iniquity and unfairness both are nouns.

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

As nouns, iniquity and unfairness are synonyms defined as:

Other synonyms of iniquity include injustice, shabbiness.

iniquity (noun)	unfairness (noun)
morally objectionable behavior	an unjust act
an unjust act	injustice by virtue of not conforming with rules or standards
	partiality that is not fair or equitable