Paying off is a term used to describe when one successfully fulfills a debt or obligation. However, there are many synonyms that can be used interchangeably with this phrase. For instance, the term "settling" can be used to refer to paying off a debt. The phrase "making good" is also a synonym for paying off since it means to correct or make something right. Additionally, "cleared" and "discharged" are commonly used as synonyms for paying off. Another potential synonym is "satisfying," which means meeting all obligations and requirements. Lastly, the phrase "honoring" a debt is also a synonym for paying it off since it implies that the debtor is fulfilling their obligations to their creditor.