Synonyms|251Antonyms|39|Broader|2Narrower|0Related|383

150 entries under adjective topic. ×

0
inalterable
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indurated(set, strong, hard, firm)
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mortified(strong, hard, tough, sturdy)
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packed(set, strong, hard, firm)
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rock hard(expression, strong, hard, tough)
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rough(strong, hard, tough, sturdy)
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serious(strong, hard, tough, sturdy)
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steel(strong, hard, tough, sturdy)
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transparent gem
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unremitting
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APASmart Define. (2015). adamantine thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/adamantine/thesaurus/synonyms
ChicagoSmart Define. 2015. "adamantine thesaurus" https://smartdefine.org/adamantine/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, adamantine thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/adamantine/thesaurus/synonyms>.
MLASmart Define. "adamantine thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/adamantine/thesaurus/synonyms>