violation vs iniquity

violation and iniquity both are nouns.

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

As nouns, iniquity is a hypernym of violation; that is, iniquity is a word with a broader meaning than violation:

Other hypernyms of violation include evil, immorality, wickedness.

violation (noun)	iniquity (noun)
a crime less serious than a felony	morally objectionable behavior
entry to another's property without right or permission	an unjust act
the crime of forcing a person to submit to sexual intercourse against his or her will
a disrespectful act
an act that disregards an agreement or a right