Synonyms of 'motor'
The engine of a car or other vehicle is the part that produces the power which makes the vehicle move.
He got into the driving seat and started the engine.
A machine is a piece of equipment which uses electricity or an engine in order to do a particular kind of work.
I put a coin in the machine and pulled the lever.
Thesaurus for motor from the Collins English Thesaurus
The motor in a machine, vehicle, or boat is the part that uses electricity or fuel to produce movement, so that the machine, vehicle, or boat can work.