164 entries under adjective topic. ×

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cold(strong, rational, straightforward, realistic)
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common(reasonable, sensible, sober, practical)
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constrained(strong, cold, standoffish, formal)
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dense(strong, hard, tough, sturdy)
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easy(reasonable, sensible, sober, practical)
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ferric(strong, hard, tough, sturdy)
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ferrous(strong, hard, tough, sturdy)
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forced(strong, cold, standoffish, formal)
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formal(strong, cold, standoffish, stuffy)
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heavy(strong, hard, tough, sturdy)
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indomitable(strong, hard, tough, sturdy)
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insensible(strong, hard, tough, sturdy)
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jelled(inflexible, unbending)
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labored(strong, cold, standoffish, formal)
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located(inflexible, unbending)
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logical(sharp, practical, realistic, shrewd)
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mannered(strong, cold, standoffish, formal)
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placed(inflexible, unbending)
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plainspoken(reasonable, sensible, sober, practical)
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pompous(strong, cold, standoffish, formal)
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APASmart Define. (2015). hardheaded thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/hardheaded/thesaurus/synonyms
ChicagoSmart Define. 2015. "hardheaded thesaurus" https://smartdefine.org/hardheaded/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, hardheaded thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/hardheaded/thesaurus/synonyms>.
MLASmart Define. "hardheaded thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/hardheaded/thesaurus/synonyms>