The term 'put money (on)' can be summarized by two crossword solutions: WAGER (5 letters) and BET (3 letters). WAGER is a synonym for BET, which is an agreement between two parties to risk something of value on the outcome of an event. The event could be a game, a race, or any other type of competition. The parties involved in the BET agree to pay the winner a certain amount of money or other form of compensation. Betting is a popular form of gambling and has been around since ancient times.