motor vs stepping motor

motor and stepping motor both are nouns.

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

As nouns, stepping motor is a hyponym of motor; that is, stepping motor 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
stepping motor: a motor (especially an electric motor) that moves or rotates in small discrete steps

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

motor (noun)	stepping motor (noun)
machine that converts other forms of energy into mechanical energy and so imparts motion	a motor (especially an electric motor) that moves or rotates in small discrete steps
a nonspecific agent that imparts motion

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

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