Excellence rhymes with:
insolence, ambivalence, ambulance, benevolence, equivalence, insolence, nonviolence, opulence, pestilence, petulance, prevalence, somnolence, turbulence, vigilance, violence, virulence
Excellence sounds like:
echelons, echlin's, equaling, equilink, excellencies, excellency, excelling, exclaiming, exclaims