Valence rhymes with:
surveillance, surveillance, ambivalence, ambulance, balance, ballance, benevolence, condolence, counterbalance, dolence, equivalence, excellence, imbalance, insolence, nonviolence, opulence, palance, parlance, pestilence, petulance, prevalence, resemblance, roylance, semblance, silence, somnolence, surveillance, turbulence, unbalance, vallance, vigilance, violence, virulence
Valence sounds like:
valencia, valencia's, valens, valenza, vallance, valuing, veiling, villainous, villains, villines, vilnius, violence, violins, volume's, volumes, voluminous