Synonyms for Stepper (same or very similar meaning)
WordNet sense 1 (a professional dancer):
hooferWordNet sense 2 (a motor (especially an electric motor) that moves or rotates in small discrete steps):
stepping motorWordNet sense 3 (a horse trained to lift its feet high off the ground while walking or trotting):
high stepperFrom the ODE community, based on WordNetadd/edit