motor vs gearmotor

motor and gearmotor both are nouns.

Word	Noun	Adjective	Verb	Adverb
motor	Yes	Yes	Yes	No
gearmotor	Yes	No	No	No

As nouns, gearmotor is a hyponym of motor; that is, gearmotor is a word with a more specific, narrower meaning than motor:

motor: machine that converts other forms of energy into mechanical energy and so imparts motion
gearmotor: a motor combined with a set of speed-reducing gears.

Other hyponyms of motor include electric motor, engine, stepper, stepping motor, hydraulic motor.

motor (noun)	gearmotor (noun)
machine that converts other forms of energy into mechanical energy and so imparts motion	a motor combined with a set of speed-reducing gears.
a nonspecific agent that imparts motion

motor (adjective)	gearmotor (adjective)
causing or able to cause motion
conveying information to the muscles from the CNS

motor (verb)	gearmotor (verb)
travel or be transported in a vehicle