Synonyms|169Antonyms|1|Broader|0Narrower|0Related|52
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dull
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emboldened
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encouraged
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fibrous(adjective, strong, hard, solid, stiff)
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fit(adjective, strong, hard, solid, stiff)
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fortified
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frozen
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girded
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hard-edged(adjective, toughened, cynical, hard-boiled, hard-bitten)
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hardboiled(adjective, seasoned, coldhearted, unsubmissive, hard-as-nails)
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hardnosed
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impenitent(adjective, hard, unfeeling, unsympathetic, hardened)
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imperturbable
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incorrigible
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indifferent(adjective, hard, unfeeling, unsympathetic, hardened)
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indigestible(adjective, strong, hard, solid, stiff)
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inexcitable
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inexorable
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inflexible(adjective, strong, hard, solid, stiff)
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inhuman
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APASmart Define. (2015). steeled thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/steeled/thesaurus/synonyms
ChicagoSmart Define. 2015. "steeled thesaurus" https://smartdefine.org/steeled/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, steeled thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/steeled/thesaurus/synonyms>.
MLASmart Define. "steeled thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/steeled/thesaurus/synonyms>