73 entries under dreadful topic. ×

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crabbed(adjective, unpleasant, horrible, disagreeable)
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crabby(adjective, unpleasant, horrible, disagreeable)
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dour(adjective, unpleasant, horrible, disagreeable)
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fell(adjective, unpleasant, horrible, disagreeable)
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formidable(adjective, unpleasant, awful, disgusting, horrible)
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gloomy(adjective, unpleasant, horrible, disagreeable)
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glum(adjective, unpleasant, horrible, disagreeable)
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grievous(adjective, unpleasant, awful, terrible, horrible)
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hair-raising(awful, terrible, shocking, upsetting)
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low(adjective, evil, unpleasant, base, awful)
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low-down(adjective, unpleasant, horrible, disagreeable)
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major(adjective, unpleasant, horrible, disagreeable)
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malevolent(adjective, unpleasant, horrible, disagreeable)
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menacing(adjective, unpleasant, horrible, disagreeable)
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messy(adjective, unpleasant, horrible, disagreeable)
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morose(adjective, unpleasant, horrible, disagreeable)
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ominous(adjective, unpleasant, horrible, disagreeable)
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pugnacious(adjective, offensive, unpleasant, disgusting, horrible)
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quarrelsome(adjective, unpleasant, horrible, disagreeable)
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saturnine(adjective, unpleasant, horrible, disagreeable)
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APASmart Define. (2016). sickening thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/sickening/thesaurus/synonyms
ChicagoSmart Define. 2016. "sickening thesaurus" https://smartdefine.org/sickening/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, sickening thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/sickening/thesaurus/synonyms>.
MLASmart Define. "sickening thesaurus" 29 March 2016. Web. 29 September 2026. <https://smartdefine.org/sickening/thesaurus/synonyms>