4
shy(adjective, reserved, timid, retiring, bashful)
4
wicked(adjective, bad, awful, disgusting, sinful)
3
apprehensive(adjective, fear, afraid)
3
atrocious
3
awing
3
baleful(adjective, black, bodeful)
3
eldritch(adjective, bad, awful, disgusting, black)
3
gloomy(adjective, black, baleful, bodeful)
3
grotesque(adjective, black, baleful, bodeful)
3
hideous
3
horrid
3
ill-omened(adjective, black, baleful, bodeful)
3
inauspicious(adjective, black, baleful, bodeful)
3
lurid(adjective, bad, awful, disgusting, black)
3
panicky(adjective, fear, afraid)
3
powerful(adjective, alarming)
3
redoubtable(adjective, fear)
3
skittish(adjective, afraid)
3
spine-chilling(adjective, bad, awful, disgusting, sinful)
3
striking(adjective, awful, wonderful, amazing, grand)
11 years ago|5.2k views|share |citing 
APASmart Define. (2015). fearsome thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/fearsome/thesaurus/synonyms
ChicagoSmart Define. 2015. "fearsome thesaurus" https://smartdefine.org/fearsome/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, fearsome thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/fearsome/thesaurus/synonyms>.
MLASmart Define. "fearsome thesaurus" 17 July 2015. Web. 23 September 2026. <https://smartdefine.org/fearsome/thesaurus/synonyms>