Revenant

revenant \ˈre-və-ˌnäⁿ, -nənt\ noun: one that returns after death or a long absence

Etymology: French, from present participle of revenir to return

Wikipedia’s entry states, “A revenant is a visible ghost or animated corpse that was believed to return from the grave to terrorize the living. Belief in revenants emerged in Western Europe during the High Middle Ages.”