Motorboat

A motorboat is a boat which is powered by an engine (also commonly called a "motor"). Some motorboats are made with inboard engines; others have an outboard motor installed on the outside, containing the internal combustion engine, the gearbox and the propeller in one portable unit.
An inboard/outboard contains a hybrid of a powerplant and an outboard, where the internal combustion engine is installed inside the boat, and the gearbox and propeller are outside.