Co-habitant is a term that is commonly used to refer to a person who shares a dwelling with another. However, there are many synonyms for this word that can be used to express the same idea. Some of the most popular synonyms for co-habitant include roommate, housemate, flatmate, lodger, boarder, tenant, and occupant. Each of these words conveys the idea that two or more people are living in the same place, regardless of the specifics of the living arrangement. By using synonyms for co-habitant in writing or conversation, individuals can add variety and interest to their language while still conveying the same basic meaning.