Synonyms|404Antonyms|106|Broader|1Narrower|0Related|115

141 entries under tough topic. ×

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bleak(adjective, severe, harsh, cruel)
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brutal(adjective, harsh, cruel, grim)
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cold(adjective, harsh, cruel, grim)
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cold-blooded(adjective, harsh, cruel, grim)
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determined(adjective, strong, hard, strong-minded)
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disagreeable(adjective, severe, harsh, cruel)
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distressing(adjective, severe, harsh, grim)
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dour(adjective, severe, harsh, cruel)
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exacting(adjective, severe, harsh, grim)
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ferric(adjective, strong, hard)
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ferrous(adjective, strong, hard)
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grievous(adjective, severe, harsh, cruel)
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grim(adjective, severe, harsh, cruel)
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hard-nosed(adjective, stubborn, hardened, cynical)
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hard-shelled(adjective, rough, hardened, cynical)
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harsh(adjective, cruel, grim, unfeeling)
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headstrong(adjective, rough, hardened, cynical)
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hostile(adjective, severe, harsh, cruel)
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implacable(adjective, strong, hard)
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inclement(adjective, severe, harsh, cruel)
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APASmart Define. (2015). hard as nails thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/hard_as_nails/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard as nails thesaurus" https://smartdefine.org/hard_as_nails/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, hard as nails thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/hard_as_nails/thesaurus/synonyms>.
MLASmart Define. "hard as nails thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/hard_as_nails/thesaurus/synonyms>