Wraith

1. (n.) An apparition of a person in his exact likeness, seen before death, or a little after; hence, an apparition; a specter; a vision; an unreal image.

2. (n.) Sometimes, improperly, a spirit thought to preside over the waters; -- called also water wraith.

Thesaurus Entries

Doppelganger, Masan, apparition, appearance, astral, astral spirit, banshee, co-walker, control, departed spirit, disembodied spirit, double, doubleganger, duppy, dybbuk, eidolon, etheric double, fantasy, fetch, figure, form, ghost, grateful dead, guide, hant, haunt, idolum, image, immateriality, incorporeal, incorporeal being, incorporeity, larva, lemures, manes, materialization, oni, phantasm, phantasma, phantasmagoria, phantom, poltergeist, presence, revenant, shade, shadow, shape, shrouded spirit, specter, spectral ghost, spirit, spook, sprite, theophany, unsubstantiality, vision, waking dream, walking dead man, wandering soul, wildest dream, zombie