Simoniacal is an adjective used to describe a person or behavior that involves the buying or selling of spiritual or religious benefits. Some synonyms for simoniacal include sacrilegious, profane, unrighteous, and immoral. These terms all convey a sense of wrongdoing or violation of religious morality. Other synonyms for simoniacal include corrupt, venal, and mercenary, which suggest a strong desire for personal gain or profit at the expense of religious principles. Ultimately, the choice of synonym depends on the context in which it is used, but all of these terms share a condemnation of behavior that exploits spiritual beliefs for personal gain.