Self-amortizing is a term that is commonly used in the world of finance and accounting. It refers to a type of loan or investment where the principal amount is repaid over a period of time through a series of fixed payments. Synonyms for this term include self-liquidating, self-paying, self-extinguishing, and self-sustaining. These terms all describe investments or loans that do not require additional funds to be repaid beyond the initial investment. Self-amortizing loans are popular among investors because they allow for a predictable stream of income over a set period of time. They are also favored by borrowers because they enable them to gradually pay off their debts without having to make large lump sum payments.