"spook" in the noun sense
1. creep, weirdo, weirdie, weirdy, spook
someone unpleasantly strange or eccentric
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"
"spook" in the verb sense
1. spook
frighten or scare, and often provoke into a violent action
"The noise spooked the horse"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License