any venturesome undertaking especially one with an uncertain outcome

an investment that is very risky but could yield great profits; he knew the stock was a speculation when he bought it

[ Syn: speculation ]

a commercial undertaking that risks a loss but promises a profit

proceed somewhere despite the risk of possible dangers; We ventured into the world of high-tech and bought a supercomputer

[ Syn: embark ]

put forward, of a guess, in spite of possible refutation; I am guessing that the price of real estate will rise again; I cannot pretend to say that you are wrong

[ Syn: guess , pretend , hazard ]

put at risk; I will stake my good reputation for this

[ Syn: hazard , adventure , stake , jeopardize ]