When it comes to tracking your spending, there are many synonyms for the word "expense." Some of these include cost, expenditure, outlay, charge, fee, bill, payment, and disbursement. These words can be used interchangeably in certain contexts to emphasize the financial burden of a particular transaction. Additionally, other words like overhead, overheads, and operating costs can be used to describe ongoing expenses associated with running a business or maintaining a household. Regardless of the synonym used, it's important to keep an accurate record of all expenses to maintain financial health and make informed financial decisions.