From WordNet (r) 3.0 (2006):
adventure
n 1: a wild and exciting undertaking (not necessarily lawful)
[syn: adventure, escapade, risky venture, dangerous
undertaking]
v 1: take a risk in the hope of a favorable outcome; "When you
buy these stocks you are gambling" [syn: gamble,
chance, risk, hazard, take chances, adventure,
run a risk, take a chance]
2: put at risk; "I will stake my good reputation for this" [syn:
venture, hazard, adventure, stake, jeopardize]