spook Synonyms

scare stiff unstring unsettle unnerve uncalm umbra terrorize terrify startle spy spirit spectre specter sleeper shock shadow shade scarify upset vision weirdy weirdie scare the pants off scare off poltergeist infiltrator give someone the creeps freak out revenant weirdo bogeyman secret agent terrorise appal come with wraith visitant scare presence frighten fantom espionage eidolon draggle disturb dismay creep concatenate catenate bogey