The term AUTOMOBILE MOTOR can be broken down into two crossword solutions: BUS (3 letters) and AUTOMOBILE (10 letters). A BUS is a type of motor vehicle used for public transportation, typically with multiple doors and seating for many passengers. An AUTOMOBILE motor is the engine that powers an AUTOMOBILE, which is a self-propelled vehicle used for transportation. AUTOMOBILE motors are typically powered by gasoline or diesel fuel and are designed to provide power to the wheels of the vehicle.