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2 entries under recalcitrant topic. ×

1
hard as nails(expression, adjective, idiom, strong, hard)
0
withstanding(adjective, strong, hard, solid, stiff)
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APASmart Define. (2011). tough as nails thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/tough_as_nails/thesaurus/synonyms
ChicagoSmart Define. 2011. "tough as nails thesaurus" https://smartdefine.org/tough_as_nails/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2011, tough as nails thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/tough_as_nails/thesaurus/synonyms>.
MLASmart Define. "tough as nails thesaurus" 24 May 2011. Web. 1 October 2026. <https://smartdefine.org/tough_as_nails/thesaurus/synonyms>