60 entries under secure topic. ×

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hooked(rigid, inflexible, stubborn, immovable)
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immotile(rigid, inflexible, stubborn, immovable)
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located(rigid, inflexible, stubborn, immovable)
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made fast(expression, rigid, inflexible, stubborn)
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motionless(strong, substantial, stable, unmoving)
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mounted(strong, substantial, stable, unmoving)
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petrified(strong, substantial, stable, unmoving)
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quiet(rigid, inflexible, stubborn, immovable)
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riveted(strong, substantial, stable, unmoving)
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safe(adjective, strong, steady, stable)
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screwed(strong, substantial, stable, unmoving)
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secured(strong, substantial, stable, unmoving)
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situated(rigid, inflexible, stubborn, immovable)
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soldered(strong, substantial, stable, unmoving)
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spiked(strong, substantial, stable, unmoving)
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static
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stationary(strong, substantial, stable, rigid)
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still(rigid, inflexible, stubborn, immovable)
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unfluctuating(strong, substantial, stable, unmoving)
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welded(strong, substantial, stable, unmoving)
<123>
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APASmart Define. (2015). tenacious thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/tenacious/thesaurus/synonyms
ChicagoSmart Define. 2015. "tenacious thesaurus" https://smartdefine.org/tenacious/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, tenacious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/tenacious/thesaurus/synonyms>.
MLASmart Define. "tenacious thesaurus" 6 November 2015. Web. 22 September 2026. <https://smartdefine.org/tenacious/thesaurus/synonyms>