A "bill of account" is a financial document that outlines the specific goods and services purchased by a customer and their corresponding costs. There are several synonyms for this term, including invoice, statement, balance due, and accounts payable. An invoice is a formal document that is sent to a customer outlining the specific goods or services they have purchased and the corresponding charges. A statement is a summary of an account that outlines the current balance due and any outstanding charges. Balance due refers to the amount owed by a customer for goods or services purchased, while accounts payable refers to the total amount owed to creditors for goods or services purchased on credit.