Divisionist refers to someone who advocates or practices division, often causing fragmentation or disunity within a group or community. There are several synonyms for this term, including separatist, secterian, schismatic, isolationist, factional, and partisan. A separatist is someone who advocates for the separation of a particular group or community, while a sectarian is one who emphasizes the importance of a particular sect or group. Schismatic refers to someone who causes division or separation within a religious organization, while isolationist refers to someone who advocates for complete separation from other nations or organizations. Lastly, factional and partisan refer to individuals who are strongly committed to a particular group or party and may often prioritize their interests above those of the larger group.