The term "iniquitousness" describes behavior or actions that are morally wrong and unjust. Therefore, the antonyms of iniquitousness would be words that convey positive and ethical behaviors. Words such as righteousness, virtue, morality, fairness, honor, and equity all provide a distinct contrast to the negative connotations of iniquitousness. These words describe actions that are right, just, and fair to all parties involved. Additionally, words such as honesty, integrity, and nobility come with a sense of integrity and doing what is right. By using these antonyms, we are promoting good ethics and morality within our communities and society as a whole.