A cheque book is a financial booklet that contains blank cheques for use in banking transactions. However, there are several other terms used to refer to this common banking item. One of the most common synonyms for cheque book is simply "checkbook," which is used interchangeably in American English. In British English, the term "chequebook" is often used. Other synonyms for cheque book include "bank book," "cheque register," "paybook," and "withdrawal book." Regardless of the term used, a cheque book remains a vital tool for making financial transactions and keeping track of one's finances.