Specter

(n.) A visible spirit; a ghost; an apparition; an object of terror; as, the spector of the Plague.

Thesaurus Entries

Dracula, Frankenstein, Wolf-man, apparition, appearance, atua, bogey, bogeyman, bugaboo, bugbear, daemon, demon, eidolon, evil spirits, fantasy, fee-faw-fum, figure, form, frightener, genius, ghost, ghoul, hobgoblin, holy terror, horror, idolum, image, incubus, intelligence, monster, nightmare, ogre, ogress, phantasm, phantasma, phantasmagoria, phantom, presence, revenant, scarebabe, scarecrow, scarer, shade, shadow, shape, spirit, succubus, supernatural being, terror, umbra, vampire, vision, waking dream, werewolf, wildest dream, wraith