Synonyms|159Antonyms|47|Broader|4Narrower|4Related|240
1
bombproof
1
bulletproof
1
burglarproof
1
clenched(verb, closed)
1
compact
1
corrosionproof
1
dustproof
1
dusttight
1
fire-resisting
1
fireproof
1
flameproof
1
foolproof
1
gas proof(adjective, tight, proof, impervious, hermetic)
1
gasproof
1
hermetically-impervious(adjective, tight, proof, impervious, hermetic)
1
hermetically-sealed(adjective, tight, proof, impervious, hermetic)
1
holeproof
1
impervious to
1
impregnable
1
incontestable(adjective, certain)
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APASmart Define. (2015). airtight thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/airtight/thesaurus/synonyms
ChicagoSmart Define. 2015. "airtight thesaurus" https://smartdefine.org/airtight/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, airtight thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/airtight/thesaurus/synonyms>.
MLASmart Define. "airtight thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/airtight/thesaurus/synonyms>