Did the ancient rishis comment anything about the kind of body ghosts have? And please don't say that ghosts do not have any bodies. People from all over the world have reported seeing their dead relatives as having the same human like features (the appearance they had while they were alive).
On top of that, they are seen in clothes. (The clothes they wore before their death).
So what exactly is this ghostly body called in sanskrit, that not only mimicks the appearance and features of it's former flesh body but could also create out of thin air, the garments that it normally rejects after death.