Amoralistic is a word that describes someone or something that lacks moral principles or is not concerned with what is right or wrong. To convey this same meaning, you can use several synonyms such as unprincipled, unethical, immoral, or corrupt. Other words that can be used interchangeably with amoralistic include amorality, which describes having no moral sense, and immorality, which refers to behavior that is immoral or unethical. Other synonyms include unscrupulous, dishonorable, and unconscionable, all of which convey the same idea that the person or thing in question lacks moral guidance or principles and is not guided by ethical considerations.