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Definitions of spook:

noun:   a mental representation of some haunting experience
noun:   someone unpleasantly strange or eccentric
verb:   frighten or scare, and often provoke into a violent action
Example: "The noise spooked the horse"

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Alternative Terms
apparition bogey bogle eidolon ghost phantasm phantom revenant shade shadow specter spirit visitant wraith haunt beings supernatural-similar-words intelligent-agents operative spy investigate-similar-words spooky stampede gecko espionage spook-band trip-hop mary-roach paki the-wardstone-chronicles tightlacer disc-jockey dancehall hip-hop-2001 spuke per-spook jean-ray sam-greenlee william-gibson benson-edward-frederic trojan-horse-computing ubiquitous the-spook-who-sat-by-the-door whoopi-goldberg off-the-map-play herbert-macnair

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