Go back to the ce, cy, ... link and you'll find, among other things, (iii) Those which exist in both forms, usually with clearly distinguishable meanings: dependence, the state of being dependent; dependency, (especially) a country or province controlled by another; emergence, a coming to light; emergency, a sudden state of danger; excellence, the state of excelling; Excellency (in His (etc.) Excellency, used as a term of address, principally to ambassadors, which looks to me like it agrees with you, Bing.