The term "illegal indulgences" is often used to refer to activities or behaviors that are prohibited by law. However, there are several other synonyms that can be used to describe such actions. For example, one might refer to these activities as banned behaviors, prohibited pleasures, unlawful gratifications, or illicit enjoyments. Other potential synonyms could include forbidden pursuits, proscribed vices, outlawed habits, or disallowed pastimes. Regardless of the specific term used, the implication is the same: engaging in these activities is considered unlawful or immoral, and may result in serious legal or social consequences.