Board Thread:General Wiki Discussion/@comment-24841732-20140428202821/@comment-24077689-20140429180928

Break it down like this:

Entities - contains stories of hauntings from Angels, Demons, Gods, Beings of supernatural origins that were never human

Ghosts/Whatever other noun you wanna use - Poltergeists, hauntings, ghosts, shadow people, all things which once  were human.

So a story that would go into Entities would be Guy's story Hebrews, ghosts would be my story My Baby. Very clear distinction, both technically dealing with a haunting or cataclysmic event outside human control, both causations are very different.