Betting pool is a term used to describe a process where a group of people put their money together before making a bet and agreeing to split the winnings equally among them. If you're looking for synonyms of this term, there are several words you can use. One option is a gambling syndicate, which refers to a group of people who pool their resources to place a bet. Another alternative is a betting exchange, which represents a digital platform where people can bet against each other instead of relying on a bookmaker. You can also use words like tipsters or tipster services, which provide betting tips and predictions to people looking to place wagers. Whatever synonym you choose, make sure you understand the context in which it will be used.