1
leak-proof(adjective, dense, resistant, impervious, impenetrable)
1
leakproof
1
leaktight(adjective, tight, proof, impervious, hermetic)
1
lightproof
1
lighttight
1
liquid-tight(adjective, tight, proof, impervious, hermetic)
1
miserly
1
noiseproof
1
nonleaking(adjective, tight, proof, impervious, hermetic)
1
oilproof
1
oiltight
1
pressureproof(adjective, tight, proof, impervious, hermetic)
1
pressurised(adjective, tight, proof, impervious, hermetic)
1
proof against
1
punctureproof
1
raintight
1
resistant
1
retentive(adjective, tight, proof, impervious, hermetic)
1
rustproof
1
sealable
11 years ago|4.7k views|share |citing 
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>