| noun | a source of danger; a possibility of incurring loss or misfortune “drinking alcohol is a health hazard” |
| noun | a venture undertaken without regard to possible loss or injury “he saw the rewards but not the risks of crime” |
| noun | the probability of becoming infected given that exposure to an infectious agent has occurred |
| noun | the probability of being exposed to an infectious agent |
| verb | expose to a chance of loss or damage “We risked losing a lot of money in this venture” |
| verb | take a risk in the hope of a favorable outcome “When you buy these stocks you are gambling” |
| hazardous | adjective | involving risk or danger |
| hazard | verb | put at risk |
| jeopardize | verb | pose a threat to; present a danger to |
| jeopardise | verb | pose a threat to; present a danger to |
| perilous | adjective | fraught with danger |
| peril | verb | put in a dangerous, disadvantageous, or difficult position |
| risky | adjective | involving risk or danger |
| risk | verb | expose to a chance of loss or damage |
| risk | noun | a venture undertaken without regard to possible loss or injury |
| gamble | noun | a risky act or venture |
| gambler | noun | someone who risks loss or injury in the hope of gain or excitement |
| chance | noun | a risk involving danger |
| hazard | noun | a source of danger; a possibility of incurring loss or misfortune |
| adventure | noun | a wild and exciting undertaking (not necessarily lawful) |
| adventurer | noun | someone who travels into little known regions (especially for some scientific purpose) |