When referring to something that is situated at the edge or furthest point of a space or region, we often use the term "outer most." However, there are several synonyms for this term that can help convey the same meaning in a slightly different way. For example, "outermost" can be substituted with "exterior," "farthest," "ultimate," "terminal," or "endmost." These terms all point to the idea of something being located at the furthest edge or border of a particular area. Understanding and being able to use these synonyms can help add variety to your writing and allow you to convey your message more effectively.