high stepper vs stepper

high stepper and stepper both are nouns.

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

As nouns, high stepper and stepper are synonyms defined as:

high stepper and stepper: a horse trained to lift its feet high off the ground while walking or trotting

high stepper (noun)	stepper (noun)
a horse trained to lift its feet high off the ground while walking or trotting	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