Cohabitant is a term used to refer to individuals who are residing together but are not married. It is typically associated with a romantic relationship or a living arrangement between roommates. There are several synonyms for the word cohabitant, including roommate, housemate, flatmate, lodger, partner, companion, and live-in lover. These terms are commonly used to describe individuals who share a living space but may not necessarily be in a romantic relationship. The use of these synonyms can help to provide greater clarity in communication and avoid any confusion or misunderstandings about the nature of the relationship between individuals who live together.