Synonyms|587Antonyms|98|Broader|5Narrower|10Related|199

60 entries under sturdy topic. ×

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ferric(adjective, strong, hard, tough)
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ferrous(adjective, strong, hard, tough)
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flinty(adjective, strong, hard, tough)
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forbidding(adjective, strong, hard, tough, terrible)
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frowning(adjective, strong, hard, tough)
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grim(adjective, strong, hard, tough)
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hang-tough(adjective, strong, hard, tough)
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hard-boiled(adjective, strong, hard, tough)
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hard-core(adjective, strong, hard, tough)
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hard-nosed(adjective, strong, hard, tough)
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hardheaded(adjective, strong, hard, tough)
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harsh(adjective, strong, hard, tough)
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heavy(adjective, strong, hard, tough)
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insensible(adjective, strong, hard, tough)
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mortified(adjective, strong, hard, tough)
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steel(adjective, strong, hard, tough)
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stiff-necked(adjective, strong, hard, tough)
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thick(adjective, strong, hard, tough)
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tough inflexible(expression, strong, hard, tough)
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unsparing(adjective, strong, hard, tough)
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APASmart Define. (2015). indomitable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/indomitable/thesaurus/synonyms
ChicagoSmart Define. 2015. "indomitable thesaurus" https://smartdefine.org/indomitable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, indomitable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/indomitable/thesaurus/synonyms>.
MLASmart Define. "indomitable thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/indomitable/thesaurus/synonyms>