1,209 entry under adjective topic. ×

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sinister(person, sad, unhappy, unpleasant)
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agonizing(pain, sickness, ache, anguishes)
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angry(person, rough, cruel, painful)
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caustic(pain, sickness, ache, anguishes)
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distressing(rough, difficult, harsh, tender)
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effortful(great, tough, difficult, harsh)
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hardy(noun, person, body, strong)
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incontrovertible(clear, certain, true, sure)
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inhumane(person, mean, tough, severe)
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malevolent(person, mean, evil, nasty)
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unsentimental(sound, tough, reasonable, sensible)
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wearying(dull, difficult, awkward, boring)
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Spartan
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alcoholic(alcohol, ingestion, intoxicating)
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barbaric(person, unwarmhearted)
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bare(simple, severe, true, dry)
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bleak(severe, sharp, flat, rough)
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close(adverb, strong, tough, correct)
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determined(strong, tough, severe, harsh)
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fatiguing(dull, difficult, awkward, boring)
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APASmart Define. (2016). hard thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/hard/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard thesaurus" https://smartdefine.org/hard/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, hard thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/hard/thesaurus/synonyms>.
MLASmart Define. "hard thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/hard/thesaurus/synonyms>