Jeopardise is a term that means to put something at RISK. IMPERIL (7 letters), ENDANGER (8 letters), HAZARD (6 letters), RISK (4 letters), THREATEN (8 letters), COMPROMISE (10 letters), MENACE (6 letters), BET (3 letters), GAMBLE (6 letters), EXPOSE (6 letters), and PERIL (5 letters) are all words that can be used to describe the act of jeopardising something. Each of these words has a slightly different connotation, but they all refer to the idea of putting something in danger.