There are various synonyms available for the phrase "put money on something." For instance, you can use the phrase "wager on" to express the idea of betting on something. Alternatively, you can say "place a bet" or "take a chance" when referring to the act of putting money on a particular outcome. Additionally, "gamble on," "stake on," or "back" are other words that can replace "put money on" when speaking about financial risks. Ultimately, the phrase you choose will depend on the context of the situation, but all of these words share a common theme of investing or risking money on a particular outcome.