Are Demons the same as "Ghosts"?

A: Ultimately, no. Whereas a ghost is generally considered to be the disembodied spirit essence

                                                                                                           

of a deceased person (or animal, in some cases), a demon was never physically alive, in the way

in which we are familiar with life. Because demons are spirit beings, & sometimes function in similar ways - even sometimes intentionally masquerading as ghosts - they are often mistaken as being ghosts. However, there is actually quite a difference between the two, both in character & abilities.