77 entries under adjective topic. ×

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changeless(firm, solid, stable, fixed)
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constant(firm, sensible, solid, steady)
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cool(firm, sensible, solid, steady)
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dependable(firm, sensible, solid, steady)
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durable(firm, solid, stable, fixed)
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enduring(firm, solid, stable, fixed)
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equable(firm, sensible, solid, steady)
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even(firm, solid, stable, fixed)
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fast(firm, sensible, solid, steady)
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firm(solid, stable, fixed, sturdy)
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fixed(firm, solid, stable, sturdy)
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immovable(firm, solid, stable, fixed)
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imperturbable(firm, sensible, solid, steady)
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intense(firm, sensible, solid, steady)
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levelheaded(firm, sensible, solid, steady)
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liege(firm, sensible, solid, steady)
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loyal(firm, sensible, solid, steady)
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never-failing(firm, solid, stable, fixed)
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patterned(firm, solid, stable, fixed)
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poised(firm, sensible, solid, steady)
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APASmart Define. (2015). serious-minded thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/serious-minded/thesaurus/synonyms
ChicagoSmart Define. 2015. "serious-minded thesaurus" https://smartdefine.org/serious-minded/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, serious-minded thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/serious-minded/thesaurus/synonyms>.
MLASmart Define. "serious-minded thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/serious-minded/thesaurus/synonyms>