Coin-operated is a term used to describe any machine that requires money to operate, but there are various synonyms that you can use to describe it. You could use the term token-operated to describe a machine that uses tokens instead of coins. Alternatively, you could use the phrase pay-per-use to describe a machine that charges for each use. The term vending machine is also often used to describe a coin-operated machine that dispenses goods, such as food or beverages. Another synonym for coin-operated is self-service, as these machines require the user to perform the action themselves rather than requiring assistance from an operator.