landlord
owner of a house, apartment, condominium, land or real estate, which is rented or leased to an individual or business, called a tenant, lessee or renter
rentier
person whose income derives from rents, interest on investments, and other passive returns
overlord
lord of a tenant
absentee landlord
economic term for a person who owns and rents out a profit-earning property
slumlord
term