Synonyms|1.1kAntonyms|270|Broader|17Narrower|0Related|1.6k

124 entries under tough topic. ×

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hardboiled
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nonporous(hard, solid, rigid)
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steel(adjective, strong, hard, sturdy)
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tough inflexible(expression, strong, hard, sturdy)
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APASmart Define. (2016). inflexible thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/inflexible/thesaurus/synonyms
ChicagoSmart Define. 2016. "inflexible thesaurus" https://smartdefine.org/inflexible/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, inflexible thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/inflexible/thesaurus/synonyms>.
MLASmart Define. "inflexible thesaurus" 24 March 2016. Web. 1 October 2026. <https://smartdefine.org/inflexible/thesaurus/synonyms>