Synonyms|905Antonyms|165|Broader|8Narrower|0Related|298

194 entries under hard topic. ×

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disciplinary(adjective, strong, tough, sturdy)
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ferric(adjective, strong, tough, sturdy)
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ferrous(adjective, strong, tough, sturdy)
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frowning(adjective, strong, tough, sturdy)
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hard-and-fast(resolute, rigid, inflexible, strict)
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hatchetjob(adjective, mean, harsh, cold)
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killer instinct(expression, adjective, mean, harsh)
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mortified(adjective, strong, tough, sturdy)
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robust(adjective, strong, tough, sturdy)
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rock hard(expression, adjective, strong, tough)
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satanic(adjective, mean, harsh, cold)
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steel(adjective, strong, tough, sturdy)
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thick(adjective, strong, tough, sturdy)
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tough inflexible(expression, strong, tough, sturdy)
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APASmart Define. (2016). obdurate thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/obdurate/thesaurus/synonyms
ChicagoSmart Define. 2016. "obdurate thesaurus" https://smartdefine.org/obdurate/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, obdurate thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/obdurate/thesaurus/synonyms>.
MLASmart Define. "obdurate thesaurus" 23 March 2016. Web. 27 September 2026. <https://smartdefine.org/obdurate/thesaurus/synonyms>