Same word as kelpie:
apparition, appearance, banshee, daemon, demon, devil, eidolon, ethereal being, haunt, incorporeal being, kelpie, manes, phantasm, phantom, poltergeist, revenant, shade, shadow, soul, specter, spook, vampire, vision, visitor, wraith, zombie
apparition, appearance, banshee, daemon, demon, devil, eidolon, ethereal being, haunt, incorporeal being, kelpie, manes, phantasm, phantom, poltergeist, revenant, shade, shadow, soul, specter, spook, vampire, vision, visitor, wraith, zombie