Shotgun is a common word used to describe a type of firearm that is designed to fire multiple pellets at once. However, there are several synonyms for the word shotgun that can also be used to describe this type of weapon. Some of these synonyms include scattergun, blunderbuss, and coach gun. Scattergun is a term that is often used to describe a shotgun that is intended for hunting or sport shooting. Blunderbuss is an older term that refers to a shotgun that has a flared muzzle, while a coach gun is a shorter version of a shotgun that was originally designed for use by stagecoach drivers and other travelers.