A zombie is an undead creature. It was once a living, animate being. Therefore, it fits the definition of undead. The meat on a plate was also once alive, so it's the meat of a dead creature, a corpse. But that doesn't make it any less appetizing :). By the way, it's precisely because of compassion for animals and the understanding that it's dead flesh that vegetarians don't eat meat ;).

Necropolis is not a castle. There is a Necropolis castle ;). I agree that the concept of a "Necropolis race" is not entirely appropriate, but it implies a "race of undead," i.e., a "race of the dead." Does that make sense? And the dead are no worse than demons, humans, or elves :).