Iniquity adjectives are listed in this post. Each word below can often be found in front of the noun iniquity in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing INIQUITY.
abominable, flagrant, forgiving
foul, great, gross
human, mine, monstrous
moral, much, national
old, own, political
Hope this word list had the adjective used with iniquity you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.