56 entries under rugged topic. ×

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astringent(adjective, strong, hard, tough, sturdy)
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austere(adjective, strong, hard, tough, sturdy)
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authoritarian(adjective, strong, hard, tough, sturdy)
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bitter(adjective, strong, hard, tough, sturdy)
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bullheaded(adjective, strong, hard, tough, stupid)
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by the book(expression, adjective, idiom, strong, hard)
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disciplinary(adjective, strong, hard, tough, sturdy)
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dyed-in-the-wool(adjective, strong, hard, tough, sturdy)
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ferric(adjective, strong, hard, tough, sturdy)
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ferrous(adjective, strong, hard, tough, sturdy)
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forbidding(adjective, strong, hard, tough, sturdy)
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frowning(adjective, strong, hard, tough, sturdy)
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grim(adjective, strong, hard, tough, sturdy)
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hang-tough(adjective, strong, hard, tough, sturdy)
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hard-boiled(adjective, strong, hard, tough, sturdy)
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hard-core(adjective, strong, hard, tough, sturdy)
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hard-line(adjective, strong, hard, tough, sturdy)
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hard-nosed(adjective, strong, hard, tough, sturdy)
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hard-shell(adjective, strong, hard, tough, sturdy)
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hardheaded(adjective, strong, hard, tough, sturdy)
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APASmart Define. (2015). dense thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/dense/thesaurus/synonyms
ChicagoSmart Define. 2015. "dense thesaurus" https://smartdefine.org/dense/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, dense thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/dense/thesaurus/synonyms>.
MLASmart Define. "dense thesaurus" 17 July 2015. Web. 24 September 2026. <https://smartdefine.org/dense/thesaurus/synonyms>