Nouns

(n)hazard, jeopardy, peril, risk, endangermenta source of danger; a possibility of incurring loss or misfortune“drinking alcohol is a health hazard”
(n)riskiness, perila state of danger involving risk
(n)risk, peril, dangera 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”

Verbs

(v)endanger, jeopardize, jeopardise, menace, threaten, imperil, perilpose a threat to; present a danger to“The pollution is endangering the crops”
(v)queer, expose, scupper, endanger, perilput in a dangerous, disadvantageous, or difficult position