186 entries under adjective topic. ×

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iron-handed
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lusty(strong, hard, solid, stiff)
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malicious(nasty, unkind, pitiless, merciless)
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molded(strong, hard, solid, stiff)
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nasty(unkind, pitiless, malicious, merciless)
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painstaking
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pertinacious
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punitive
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resilient(strong, hard, solid, stiff)
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robust(strong, hard, tough, solid)
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seasoned(strong, hard, solid, stiff)
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silicon dioxide
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solidified
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steel(strong, hard, tough, sturdy)
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stringent
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taxing
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tenacious
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thick(strong, hard, tough, sturdy)
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tight(strong, hard, solid, stiff)
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tough as nails(expression, idiom, strong, hard)
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APASmart Define. (2015). flinty thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/flinty/thesaurus/synonyms
ChicagoSmart Define. 2015. "flinty thesaurus" https://smartdefine.org/flinty/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, flinty thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/flinty/thesaurus/synonyms>.
MLASmart Define. "flinty thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/flinty/thesaurus/synonyms>