Synonyms|159Antonyms|47|Broader|4Narrower|4Related|240
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showerproof
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shutter
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shuttered
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shuttering
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shutters
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solid
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stiff
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stiffness
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stove
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stringent
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tamper-proof
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taut
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tense
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tipsy
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totally sealed
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unattended
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unfeelingness
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water-resistant(adjective, dense, resistant, impervious, impenetrable)
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without loopholes
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APASmart Define. (2015). airtight thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/airtight/thesaurus/synonyms
ChicagoSmart Define. 2015. "airtight thesaurus" https://smartdefine.org/airtight/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, airtight thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/airtight/thesaurus/synonyms>.
MLASmart Define. "airtight thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/airtight/thesaurus/synonyms>