Highmindedness is a word that describes a person with a strong sense of ethical and moral principles. However, the antonyms for highmindedness include words like insincerity, dishonesty, and deceitfulness. These words are often associated with people who are selfish, arrogant, and lacking in moral values. Other antonyms for highmindedness include words like ignorance, stupidity, and foolishness. These words reflect a lack of knowledge or comprehension of moral values, and a disregard for ethical behavior towards others. In contrast, the synonyms for highmindedness include words like honor, integrity, nobility, and righteousness. These are the qualities that reflect a person with high moral principles and values.