(an attempt or activity with) a risk of loss or a chance of profit; to play games to try to win money

chance, speculation

not likely to be true or to happen

not likely

probability

chance of something happening

the state, degree, of being possible; something that is possible

feasibility, likelihood; chance

the quality of being probable; likelihood

likelihood of something happening

not likely to happen or be true

not probable

(to offer (something) as) a bet (the usual word)

money or something gambled