The term 'bumper car' is also known as a 'dodgem', which is a six-letter word. Bumper cars are small, electric-powered vehicles that are used for amusement rides. They are typically driven in an enclosed area, such as an amusement park, and are designed to collide with each other without causing serious damage. The cars are usually powered by a battery and have a bumper on the front and back to protect the riders from impact.