"perils" in the noun sense
1. hazard, jeopardy, peril, risk, endangerment
a source of danger a possibility of incurring loss or misfortune
"drinking alcohol is a health hazard"
2. riskiness, peril
a state of danger involving risk
3. risk, peril, danger
a venture undertaken without regard to possible loss or injury
"he saw the rewards but not the risks of crime"
"there was a danger he would do the wrong thing"
"perils" in the verb sense
1. endanger, jeopardize, jeopardise, menace, threaten, imperil, peril
pose a threat to present a danger to
"The pollution is endangering the crops"
2. queer, expose, scupper, endanger, peril
put in a dangerous, disadvantageous, or difficult position
Source: WordNet® (An amazing lexical database of English)
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