The term "in-cult" refers to someone who is deeply involved in a particular culture or community, often to the exclusion of others. Synonyms for this word might include phrases like "immersed in," "dedicated to," or "passionate about." Other potential synonyms might include words like "insider," "enthusiast," or "aficionado." Depending on the context in which the word is being used, additional synonyms could include phrases like "active participant," "committed member," or "devoted follower." Ultimately, the term "in-cult" is designed to convey a sense of meaningful involvement in a particular culture, and any of these synonyms could be used to describe someone who fits that description.