152 entries under adjective topic. ×

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fast(sound, firm, safe, sheltered)
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fastened(sound, firm, safe, sheltered)
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fortified(safe, sheltered, protected, locked)
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having down pat
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immovable(safe, sheltered, protected, locked)
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immune(safe, sheltered, protected, locked)
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in safe hands(expression, idiom, snug, intact)
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in the bag
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intense
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iron(safe, sheltered, protected, locked)
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leakproof
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locked(sound, firm, safe, sheltered)
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nailed(sound, firm, safe, sheltered)
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on ice
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predestined
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provable
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riskless(safe, sheltered, protected, locked)
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safe as houses(expression, idiom, safe, sheltered)
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salted away
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solid as a rock(expression, idiom, safe, sheltered)
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APASmart Define. (2015). unassailable thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unassailable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unassailable thesaurus" https://smartdefine.org/unassailable/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unassailable thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unassailable/thesaurus/synonyms>.
MLASmart Define. "unassailable thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/unassailable/thesaurus/synonyms>