There are several synonyms for the term "open accounts". Some of the most common ones include "unpaid accounts", "outstanding balances", "unsettled debts", and "credit balances". These terms refer to any kind of debt that a person or business has outstanding with a particular creditor or lender. Other synonyms might include "active accounts", "current balances", or "ongoing obligations". Regardless of the specific phrasing used, all of these synonyms refer to the fact that a person or business has some kind of financial obligation that is currently outstanding and has not yet been fully paid off or settled.