stepping motor vs stepper

stepping motor and stepper both are nouns.

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

As nouns, stepping motor and stepper are synonyms defined as:

stepping motor and stepper: a motor (especially an electric motor) that moves or rotates in small discrete steps

stepping motor (noun)	stepper (noun)
a motor (especially an electric motor) that moves or rotates in small discrete steps	a horse trained to lift its feet high off the ground while walking or trotting
	a motor (especially an electric motor) that moves or rotates in small discrete steps
	a professional dancer