Bankers bill is a financial term that refers to a short-term, negotiable debt instrument that is issued by a bank and backed by its creditworthiness. There are several synonyms for bankers bills, and these include bank bills, promissory notes, commercial paper, and short-term paper. Bank bills are the most commonly used synonym for bankers bills and are issued by banks to raise short-term funds. Promissory notes, on the other hand, are written promises to pay a certain amount of money on a specific date. Commercial paper refers to short-term unsecured debt issued by corporations, while short-term paper is a generic term used to describe various types of short-term debt instruments.