208 entries under tough topic. ×

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astringent(adjective, strong, hard, rugged)
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austere(adjective, strong, hard, rugged)
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authoritarian(adjective, strong, hard, energetic)
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bitter(adjective, strong, hard, rugged)
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bright-eyed(strong, fit, fresh, well)
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bullheaded(adjective, strong, hard, rugged)
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bushy-tailed(strong, fit, fresh, well)
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by the book(expression, adjective, idiom, strong, hard)
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chipper(strong, fit, fresh, well)
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close-grained(hard, solid, rigid, inflexible)
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compressed(hard, solid, rigid, inflexible)
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condensed(hard, solid, rigid, inflexible)
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congealed(hard, solid, rigid, inflexible)
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disciplinary(adjective, strong, hard, rugged)
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dyed-in-the-wool(adjective, strong, hard, rugged)
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ferric(adjective, strong, hard, rugged)
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ferrous(adjective, strong, hard, rugged)
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fine-grained(hard, solid, rigid, inflexible)
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forbidding(adjective, strong, hard, rugged)
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frowning(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>