Agamist, meaning a person who opposes or abstains from marriage, has a few synonyms that can be used in its place. One such word is celibate, which denotes a person who abstains from sexual activity altogether. Another synonym is ascetic, referring to a person who renounces worldly pleasures and lives a self-disciplined life. A third synonym could be a recluse, someone who lives in seclusion and avoids social interaction. A fourth term that could be used in place of agamist is asexual, which refers to a person who has no sexual interest or attraction. Regardless of the word used, it is crucial to respect a person's decision to abstain from marriage or sexual activity.