There are several synonyms for the word "gamb," which means to take a risky action or chance. For example, the word "venture" means to embark on a daring or risky undertaking. The word "gamble" is also a common synonym for "gamb" and refers to taking a risky action with the hope of gaining something valuable. Another synonym could be "risk" which means to expose yourself or someone else to danger or harm. Additionally, you could use the word "speculate" which means to form a theory or conjecture about something without firm evidence. Overall, these synonyms help to encompass the many different shades of meaning associated with the word "gamb".