What is another word for "mortgagor"?

Roget's Thesaurus (1911) lists these synonyms for "mortgagor": account, and, answer, answerable, apparent, arrear, bad, bail, beneficiary, bill, borrow, borrower, capital, charge, chargeable, check, constable, contract, credit, debit, debitor, debt, debtor, deep, deeply, default, defaulter, deficit, devisee, due, estate, fast, feoffee, floating, for, from, gentry, get, grantee, head.