One synonym for "leasor" is "lessor," which has the same definition as "leasor." Another synonym is "landlord," which refers specifically to someone who owns and rents out property. A third synonym is "renter," which refers to someone who leases property from another person or organization. Other potential synonyms for "leasor" include "owner," "property owner," "landowner," and "landholder." Each of these words describes someone who holds some form of legal or financial interest in property, and who may lease or rent that property to others.