Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun spook

2 senses of spook

Sense 1
creep, weirdo, weirdie, weirdy, spook -- (someone unpleasantly strange or eccentric)
       => unpleasant person, disagreeable person -- (a person who is not pleasant or agreeable)

Sense 2
ghost, shade, spook, wraith, specter, spectre -- (a mental representation of some haunting experience; "he looked like he had seen a ghost"; "it aroused specters from his past")
       => apparition, phantom, phantasm, phantasma, fantasm, shadow -- (something existing in perception only; "a ghostly apparition at midnight")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb spook

1 sense of spook

Sense 1
spook -- (frighten or scare, and often provoke into a violent action; "The noise spooked the horse")
       => frighten, fright, scare, affright -- (cause fear in; "The stranger who hangs around the building frightens me"; "Ghosts could never affright her")