adventure in WordNet English dictionary

1. a wild and exciting undertaking (not necessarily lawful)
   adventure  escapade  risky venture  dangerous undertaking 
   

1. put at risk
   "I will stake my good reputation for this"
   venture  hazard  adventure  stake  jeopardize 
   
2. take a risk in the hope of a favorable outcome
   "When you buy these stocks you are gambling"
   gamble  chance  risk  hazard  take chances  adventure  run a risk  take a chance