10
flagrant(adjective, shame, awful, terrible, horrible)
10
hellish(adjective, awful, terrible, horrible, afraid)
10
morbid(adjective, bad, nasty, awful, terrible)
10
objectionable(adjective, dull, nasty, unpleasant, awful)
10
piercing(adjective, painful, sickness, ache, endured)
10
spooky(adjective, horrible, frightening)
10
tormenting(adjective, painful, sickness, ache, endured)
10
villainous(adjective, wicked)
9
abysmal(adjective, awful, terrible, horrible, afraid)
9
base(adjective, evil, offensive, unpleasant, terrible)
9
damnable(adjective, awful, terrible, horrible, afraid)
9
disastrous(adjective, severe, awful, terrible, extreme)
9
distasteful(verb, adjective, person, hard, nasty)
9
malevolent(adjective, unpleasant, wicked, horrible, disagreeable)
9
unholy(adjective, severe, dislike, unpleasant, awful)
8
calamitous(adjective, sad, unhappy, unpleasant, awful)
8
deadly(adjective, awful, terrible, horrible, afraid)
8
detestable(adjective, evil, nasty, offensive, unpleasant)
8
nightmarish(adjective, nasty, awful, terrible, disturbing)
8
sore(adjective, painful, sickness, ache, anguishes)
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APASmart Define. (2016). dreadful thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/dreadful/thesaurus/synonyms
ChicagoSmart Define. 2016. "dreadful thesaurus" https://smartdefine.org/dreadful/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, dreadful thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/dreadful/thesaurus/synonyms>.
MLASmart Define. "dreadful thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/dreadful/thesaurus/synonyms>