7
revenant(noun, spirit, vision, soul, supernatural)
7
spy(noun, person, plant, investigate, mole)
7
unnerve(verb, upset, trouble, hurt, bother)
6
agent(noun, plant, investigate, operative, informer)
6
agitate(verb, upset, trouble, hurt, bother)
6
bogeyman(noun, spirit, soul, supernatural, monster)
6
intimidate(verb, bother, shock, agitate, pressure)
6
phantasma(noun, supernatural, ghost, beings)
6
terrorize(verb, upset, shock, agitate, intimidate)
6
trouble(verb, upset, hurt, bother, disturb)
6
upset(verb, trouble, hurt, bother, disturb)
5
banshee(noun, spirit, vision, soul, shadow)
5
bogey(noun, supernatural, ghost, beings)
5
creep
5
disturb(verb, upset, trouble, bother, worry)
5
fluster(verb, upset, trouble, hurt, bother)
5
surprise(verb, upset, shock, agitate, alarm)
5
weirdie
5
weirdo(noun, character, figure, original, personality)
4
character(noun, person, figure, original, eccentric)
11 years ago|7k views|share |citing 
APASmart Define. (2015). spook thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/spook/thesaurus/synonyms
ChicagoSmart Define. 2015. "spook thesaurus" https://smartdefine.org/spook/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, spook thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/spook/thesaurus/synonyms>.
MLASmart Define. "spook thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/spook/thesaurus/synonyms>