There are a few synonyms for "book account" that can be useful for varying communication contexts. One of the most common synonyms for "book account" is "ledger". A ledger is a written record of financial transactions and can refer to accounts of a business organization, or even a personal account. Another possible synonym for "book account" is "journal". A journal is similar to a ledger, but it usually records daily transactions instead of overall balances. Additionally, "account book" can be used to refer to the same concept as "book account". The term "record book" can also be used in certain contexts to describe a book that tracks transactions or other events.