6
troublesome(verb, adjective, person, severe, tender)
6
uncomfortable(adjective, painful, sickness, ache, anguishes)
6
unearthly(adjective, bad, awful, terrible, strange)
6
unfortunate(adjective, severe, sad, awful, extreme)
5
Gorgonian(adjective, dull, disgusting, ugly, bad-looking)
5
arrant(adjective, inexpedience)
5
contemptible(adjective, wicked, shocking, shameful, outrageous)
5
corrupt
5
dark
5
depraved(adjective, wicked)
5
diabolic
5
difficult(adjective, sickness, ache, anguishes)
5
dismal(adjective, dejection, depressing)
5
forbidding(adjective, tough, difficult, unpleasant, terrible)
5
frumpish(adjective, dull, disgusting, ugly, bad-looking)
5
frumpy(adjective, dull, disgusting, ugly, bad-looking)
5
ghoulish(adjective, nasty, awful, terrible, disturbing)
5
grotesque(adjective, bad, bad feelings)
5
haggish(adjective, dull, disgusting, ugly, bad-looking)
5
howling(adjective, awful, terrible, horrible, afraid)
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APASmart Define. (2016). dreadful thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/dreadful/thesaurus/synonyms
ChicagoSmart Define. 2016. "dreadful thesaurus" https://smartdefine.org/dreadful/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, dreadful thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/dreadful/thesaurus/synonyms>.
MLASmart Define. "dreadful thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/dreadful/thesaurus/synonyms>