Ghost isn't a every day animal. This means that they don't actually have a name for a group of ghost. So the best term to use is in the question, 'a group of ghosts', or just 'ghosts' on it's own will be fine.
A tort of ghosts.
A person that doesn't believe in ghosts are called skeptics.
13 Ghosts
The so called "ghosts" in the Ghost Dance are the spirits of our ancestors.
Parapsychology is the study of psychic phenomena. Spectrology is the study of ghosts.
Phasmaphobia.
They are called poltergeists.
People who don't believe in ghosts are called skeptics. Skeptics typically demand scientific proof of something before they believe in it. As there is no scientific proof in ghosts, skeptics deem them as being unreal.
The vertical rows on the periodic table are called groups.The vertical rows are called periods and the horizontal columns are called groups.
It is called 1408.
yes but the like to be called spirits
avp