dancer vs stepper

dancer and stepper both are nouns.

Word	Noun	Adjective	Verb	Adverb
dancer	Yes	No	No	No
stepper	Yes	No	No	No

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

dancer (noun)	stepper (noun)
a performer who dances professionally	a horse trained to lift its feet high off the ground while walking or trotting
a person who participates in a social gathering arranged for dancing (as a ball)	a motor (especially an electric motor) that moves or rotates in small discrete steps
	a professional dancer