Undead Venn

I'm not talking about Vendread, though I often am. There are undead creatures, right? Conceptually anyway. And there are vampires and ghosts, are there not? Those are supposed to be undead, but often they aren't. It's a daily occurence that someone is transformed by a supernatural process in which dying is not involved. These non-undead creatures deserve their own category, which I propose calling "Undead for Cowards."