Synonyms|369Antonyms|90|Broader|0Narrower|0Related|365

79 entries under hard topic. ×

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ferrous(adjective, strong, tough, sturdy)
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fibrous(adjective, strong, solid, stiff)
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fit(adjective, strong, solid, stiff)
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hard-bitten(adjective, strong, solid, stiff)
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heavy(adjective, strong, tough, severe)
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indigestible(adjective, strong, solid, stiff)
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indomitable(adjective, strong, tough, sturdy)
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insensible(adjective, strong, tough, sturdy)
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lusty(adjective, strong, solid, stiff)
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molded(adjective, strong, solid, stiff)
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resilient(adjective, strong, solid, stiff)
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robust(adjective, strong, tough, solid)
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seasoned(adjective, strong, solid, stiff)
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steel(adjective, strong, tough, sturdy)
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thick(adjective, strong, tough, sturdy)
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tight(adjective, strong, solid, stiff)
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tough as nails(expression, adjective, idiom, strong)
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tough inflexible(expression, strong, tough, sturdy)
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withstanding(adjective, strong, solid, stiff)
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ChicagoSmart Define. 2015. "flinty thesaurus" https://smartdefine.org/flinty/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, flinty thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/flinty/thesaurus/synonyms>.
MLASmart Define. "flinty thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/flinty/thesaurus/synonyms>