The word "in-comer" typically refers to someone who has recently arrived in a particular place or community. As such, its antonyms would be words indicating the opposite, such as "native," "resident," or "long-time inhabitant." These words describe individuals who are established and familiar with their surroundings, in contrast to someone who is new and perhaps still adjusting. Additionally, words like "outgoer" or "departee" could also serve as antonyms for "in-comer," as they refer to individuals who are leaving or departing a place. Taken together, these antonyms provide a vivid contrast to the idea of someone who is recently arrived and still finding their place in a new community or environment.