THESAURUS
spook
Masan, affright, agent, agitate, alarm, apparition, appearance, astral, astral spirit, awe, banshee, bogey, bug, case, character, control, convulse, curdle the blood, departed spirit, discompose, disembodied spirit, disquiet, distract, disturb, duck, duppy, dybbuk, eidolon, embroil, form, fright, frighten, funk, ghost, grateful dead, guide, hant, haunt, horripilate, idolum, immateriality, incorporeal, incorporeal being, incorporeity, larva, lemures, make one tremble, manes, materialization, obsess, oddball, oddity, oni, original, perturb, phantasm, phantasma, phantom, poltergeist, possess, presence, psych, quiz, raise apprehensions, revenant, scare, shade, shadow, shake, shape, shrouded spirit, specter, spectral ghost, spirit, sprite, spy, stagger, startle, terrify, terrorize, theophany, throw, throw into confusion, trouble, undercover man, unman, unnerve, unsettle, unstring, unsubstantiality, upset, vision, walking dead man, wandering soul, wraith, zombie
ROGET THESAURUS
spook
Demon
N
demon, daemon, demonry, demonology, evil genius, fiend, familiar, daeva, devil, bad spirit, unclean spirit, cacodemon, incubus, Eblis, shaitan, succubus, succuba, Frankenstein's monster, Titan, Shedim, Mephistopheles, Asmodeus, Moloch, Belial, Ahriman, fury, harpy, Friar Rush, vampire, ghoul, afreet, barghest, Loki, ogre, ogress, gnome, gin, jinn, imp, deev, lamia, bogie, bogeyman, bogle, nis, kobold, flibbertigibbet, fairy, brownie, pixy, elf, dwarf, urchin, Puck, Robin Goodfellow, leprechaun, Cluricaune, troll, dwerger, sprite, ouphe, bad fairy, nix, nixie, pigwidgeon, will-o'-the wisp, ghost, revenant, specter, apparition, spirit, shade, shadow, vision, hobglobin, goblin, orc, wraith,
spook, boggart, banshee, loup-garou, lemures, evil eye, merman, mermaid, merfolk, siren, satyr, faun, manito, manitou, manitu, possession, demonic possession, diabolic possession, insanity, Maxwell's demon, demoniac, demonic, demonical, impish, demoniacal, fiendish, fiend-like, supernatural, weird, uncanny, unearthly, spectral, ghostly, ghost-like, elfin, elvin, elfish, elflike, haunted, pokerish, possessed, possessed by a devil, possessed by a demon, demonically.