208 entries under tough topic. ×

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grim(adjective, strong, hard, rugged)
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hang-tough(adjective, strong, hard, rugged)
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hard-boiled(adjective, strong, hard, rugged)
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hard-core(adjective, strong, hard, rugged)
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hard-nosed(adjective, strong, hard, rugged)
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hard-shell(adjective, strong, hard, rugged)
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hardheaded(adjective, strong, hard, rugged)
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harsh(adjective, strong, hard, rugged)
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implacable(adjective, strong, hard, rugged)
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inelastic(hard, solid, rigid, inflexible)
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inexorable(adjective, strong, hard, rugged)
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insensible(adjective, strong, hard, rugged)
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jelled(hard, solid, rigid, inflexible)
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mortified(adjective, strong, hard, rugged)
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nonporous(hard, solid, rigid, inflexible)
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restored(strong, fit, fresh, well)
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rigorous(adjective, strong, hard, complete)
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severe(adjective, strong, hard, rugged)
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solidified(hard, solid, rigid, inflexible)
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steel(adjective, strong, hard, rugged)
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APASmart Define. (2016). sturdy thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/sturdy/thesaurus/synonyms
ChicagoSmart Define. 2016. "sturdy thesaurus" https://smartdefine.org/sturdy/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, sturdy thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/sturdy/thesaurus/synonyms>.
MLASmart Define. "sturdy thesaurus" 24 March 2016. Web. 29 September 2026. <https://smartdefine.org/sturdy/thesaurus/synonyms>