Synonyms|40Antonyms|6|Broader|1Narrower|2Related|30
0
invulnerableness
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logical conclusiveness(expression, idiom)
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means of escape(expression, idiom, safety)
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nervous diction(expression, idiom)
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palladium
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release valve(expression, idiom, safety)
0
safeguard
0
safety valve(expression, idiom, safety)
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sniffing
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sniffing valve(expression, idiom, safety)
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solidity
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spirit
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storm blown over(verb, phrasal verb, safety)
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strength
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stronghold
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support
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validity
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valve
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vigor
0
virtue
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APASmart Define. (2015). impregnability thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/impregnability/thesaurus/synonyms
ChicagoSmart Define. 2015. "impregnability thesaurus" https://smartdefine.org/impregnability/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, impregnability thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/impregnability/thesaurus/synonyms>.
MLASmart Define. "impregnability thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/impregnability/thesaurus/synonyms>