Talk-show host Dennis Prager is a fount of wisdom. I recommend his Happiness Hour to you, and the rest of his show as well. But I just heard him say on the Happiness Hour segment of his show, "jealousy slash envy." I beg to differ. I see a distinction between the two. See my Envy, Jealousy, and <i>Schadenfreude</i>.
Distinctions are good so long as they cut the bird of reality at the joints. The more the better.