Cotenant is a word used to describe a person who shares a tenancy with others. However, there are several other synonyms for this term such as co-renter, roommate, lodger, cohabitant, flatmate, and housemate. Co-renter refers to a person who shares the rent of a property with someone else. A lodger is someone who rents a room in a house owned by someone else, while a housemate can be anyone who shares a house with others. Roommate is commonly used to refer to a person who shares a bedroom or apartment with others, while flatmate means the same thing in British English. Cohabitant is a more formal term used to describe someone who lives with another person in a non-marital relationship.