spook Synonyms

shade frighten vision ghost haunt unsettle unnerve intimidate spirit terrorize terrify startle spy operative panic specter shock scare wraith secret agent scare off spectre phantom alarm apparition weirdie frighten off sprit lemures weirdy sleeper scare stiff shadow scare the pants off intelligence agent torment run off drive off visitant weirdo send packing undercover agent revenant upset freak out infiltrator trouble poltergeist scarify espionage