Synonyms for Endanger:

n.

disadvantage, hold back, let down, burden, count against, throttle, bring up against, plague, embarrass, inhibit. safety. endanger (noun)
expose, threaten, menace, jeopardise, scupper, peril, imperil, jeopardize.
imperil (noun)
expose to hazard, put at risk, subject to loss, lay open, leave defenseless, compromise, leave in the middle, fish in troubled waters, be careless with, put in danger, expose to danger, put in jeopardy, put on the spot, expose to peril, make liable to danger, leave unprotected.

v.

communication (verb)
scupper, expose, peril.
endanger (verb)
jeopardize, imperil, menace, risk, threaten.
put in jeopardy (verb)
leave in the middle, put at risk, lay open, menace, put in danger, imperil, risk, expose, peril, put on the spot, leave defenseless, threaten, subject to loss.
stative (verb)
jeopardise, threaten, menace, imperil, peril, jeopardize.

Other synonyms:

take a chance
risk.
Other relevant words:
inhibit, embarrass, disadvantage, put in jeopardy, imperil, throttle, expose, lay open, put in danger, subject to loss, put on the spot, put at risk, plague, burden, scupper, compromise, jeopardise, safety, leave defenseless, leave in the middle, expose to danger, peril.

Usage examples for endanger

  1. " It is a very natural wish," she observed, " so long as it does not endanger his life." – The Box with the Broken Seals by E. Phillips Oppenheim
  2. He urged that he would be obliged to set them at liberty again, and that, in this case, he should endanger not only his credit among this class of men, but even his life. – The Ghost-Seer (or The Apparitionist), and Sport of Destiny by Frederich Schiller