Amortality

Amortality is the condition of never having died and being unable to die, as an amortal entity was never alive to begin with.

Poltergeists are presumably amortal, as they have been described as "indestructible spirits of chaos," and are known to differ from ghosts in that they were never alive at one time.

As amortality refers to entities that have never been alive from the beginning, it is different from "immortality", which means a living being gaining the impossibility to die.

Known amortals

 * Death
 * Handsome Poltergeist
 * Peeves