Bachelor's party is a term commonly used to describe a celebration for a groom-to-be. However, there are a few other synonyms that can be used to describe this pre-wedding celebration. These include stag party, stag night, bachelor party, and buck's night. In some countries, like Australia and New Zealand, the term "buck's night" is more commonly used, while in the UK, "stag night" is often used. Regardless of what it's called, the purpose of this celebration is to provide the groom-to-be with a memorable night before he begins his married life. This typically involves a night of drinking, partying, and occasionally some risque or embarrassing activities.