I have been asked by several people if I could add some terms that we all use in this line of research. Here are a few:

                                  Glossary of Ghostly Terms

Anomaly: A deviation from normal.
Apparition: The manifestation of a spirit, which can be seen in human form or in blobs or streaks of light.
EMF: Electromagnetic Field. Readings used to determine paranormal activity.
EVP: Electronic Voice Phenomena. Captures voices on tape when no obvious source can be found.
Earthbound: A spirit unable to leave the physical world. Filmmaker M Night Shyamalan explored this in The Sixth Sense.
Encounter: There are three kinds: intelligent and formerly human; residual energy left over from the past; and malevolent which are unfriendly.
Ghoul: A demon that enjoys a meal of human flesh.
Ghost Hunt: Investigation of a reported haunting using earthly technology to record any paranormal occurrences.
Haunting: A manifestation of unexplainable phenomena.
Orb: Seen as blotches of light in photos. This energy form is usually dismissed as a developing error.
Paranormal: The unexplained.
Poltergeist: A mischievous and sometimes malevolent spirit.
Spirit: Ghost of a deceased human.
Spirit Guide: A protective spirit who is with each person since birth