130 entries under terrible topic. ×

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ominous(adjective, unpleasant, awful, heavy)
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redoubtable(awful, dreadful, ominous)
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remorseless(adjective, cruel, brutal, unkind)
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scowling(adjective, unpleasant, awful, horrible)
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shuddersome(bad, awful, horrible, rotten)
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sickening(adjective, unpleasant, awful, horrible)
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sinister(adjective, unpleasant, awful, horrible)
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strange(awful, dreadful)
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sublime(awful, dreadful)
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unearthly(awful, dreadful)
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APASmart Define. (2016). grievous thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/grievous/thesaurus/synonyms
ChicagoSmart Define. 2016. "grievous thesaurus" https://smartdefine.org/grievous/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, grievous thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/grievous/thesaurus/synonyms>.
MLASmart Define. "grievous thesaurus" 26 February 2016. Web. 30 September 2026. <https://smartdefine.org/grievous/thesaurus/synonyms>