But I want to mention one danger related to making use of the fact that we have two words: ethics and morality. The problem is that we only have two words. We got one from Latin, and the other from Greek. But if I were to estimate, I would say that all the different relevant terms in all the different languages in the world will probably not be enough to captures all aspects of the phenomena we are interested in—all the distinctions we need to make, all the dimensions we care to be responsive to. Making a certain distinction (a single distinction) between two subject matters, or two methods for thinking about questions, or two types of attitude toward things, fixes our attention on one dimension, and may hide others from view.
It would probably be best to talk of morality/ethics as we talk of games: to refer to the different phenomena here—fuzzy boundaries, as they might have—using the different terms as synonyms, but without pretending that the phenomena must be unified in one way or another. That is, it would be best to look and see if there are differences. At any rate, this would be better than just assuming that the differences HAVE to take certain forms.