yes.. you can say that. its just like when a ghost takes over a human we call it exorcism. similarly when human takes over ghosts that's also possible. like ancient people use to take control of...
Yes, a ghost can be scared of aother ghost. Lets say a little girl was bullied by her parents, then they die the next day. The little girl would be afraid of her parents because she was whe she was...
I take it you ask this because of Edenbridge's song The Canterville Prophecy. As far as I'm aware there was no actual "prophecy" in the Canterville Ghost story, but that beautiful song pretty much...