gambling

(noun) the act of playing for stakes in the hope of winning (including the payment of a price for a chance to win a prize). Synonyms: gaming, play. Examples: "His gambling cost him a fortune." "There was heavy play at the blackjack table."

(verb) take a risk in the hope of a favorable outcome. Synonyms: gamble, chance, risk, hazard, take chances, adventure, run a risk, take a chance. Examples: "When you buy these stocks you are gambling."

(verb) play games for money. Synonyms: gamble.