3
tormenting(adjective, endured)
3
torturous(adjective, endured)
3
towering(adjective, awful, terrible, horrible, afraid)
3
tragical(adjective, awful, terrible, horrible, afraid)
3
unacceptable(adjective, endured)
3
unattractive(adjective, nasty, plain, awful, ugly)
3
uncanny(awful, terrible, immoral, shocking, atrocious)
3
unendurable(adjective, endured)
3
unsavory(adjective, terrible, dirty, badly, scary)
3
unsettling(adjective, awful, terrible, horrible, afraid)
3
unsupportable(adjective, endured)
3
woesome(adjective, awful, terrible, horrible, afraid)
3
yucky(adjective, awful, dirty, gloom, badly)
2
adverse(adjective, awful, dirty, gloom, badly)
2
awing
2
bizarre
2
brutal(adjective, violent, terrible, wild, cruel)
2
cowardly
2
distressing(adjective, unpleasant, awful, terrible, disgusting)
2
fear
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APASmart Define. (2016). frightful thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/frightful/thesaurus/synonyms
ChicagoSmart Define. 2016. "frightful thesaurus" https://smartdefine.org/frightful/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, frightful thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/frightful/thesaurus/synonyms>.
MLASmart Define. "frightful thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/frightful/thesaurus/synonyms>