In DW, creatures can be Living (or Unliving) or carcasses that are plain dead. Beasts, Monsters , PCs, Hirelings, animal companions and NPCs are all types of creatures whether they come from the World or Other Planes. The line breaks down when it comes to entities like Death. Or Nature. Or the source of Divine Authorty that empowers Paladins. Creatures can die or be destroyed. Entities are supernal. Gods might be one or the other depending on the fiction of an indvidual campaign.