Other forms: lodgers
A lodger is a person who rents a room in someone's house. If you rent out a room in your house, guess what? You'll have a lodger living with you.
As opposed to a renter, who rents an entire apartment or house, a lodger generally leases only a bedroom, sharing the use of the kitchen and bathroom with the house's other inhabitants. You could also call a lodger a "roomer" or a "boarder." Lodger comes from lodge, "small house," from the Old French loge, "hut or cabin."