73 entries under solid topic. ×

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allegiant(adjective, firm, stable, fixed)
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ardent(adjective, firm, stable, fixed)
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balanced(adjective, firm, stable, fixed)
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brick-wall(adjective, firm, steady, stable)
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consistent(strong, firm, certain, steady)
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dependable(adjective, firm, stable, fixed)
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durable(adjective, firm, stable, fixed)
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equable(adjective, firm, stable, fixed)
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even(adjective, firm, stable, fixed)
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fast(adjective, firm, stable, fixed)
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intense(adjective, firm, steady, stable)
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levelheaded(adjective, firm, stable, fixed)
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liege(adjective, firm, stable, fixed)
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patterned(adjective, firm, stable, fixed)
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poised(adjective, firm, stable, fixed)
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regular(adjective, firm, steady, stable)
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reliable(adjective, firm, stable, fixed)
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reserved(adjective, firm, stable, fixed)
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safe(adjective, firm, stable, fixed)
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secure(adjective, firm, stable, fixed)
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APASmart Define. (2015). unshaken thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unshaken/thesaurus/synonyms
ChicagoSmart Define. 2015. "unshaken thesaurus" https://smartdefine.org/unshaken/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unshaken thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unshaken/thesaurus/synonyms>.
MLASmart Define. "unshaken thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/unshaken/thesaurus/synonyms>