34 entries under proof topic. ×

1
hermetically-impervious(adjective, tight, impervious, hermetic)
1
hermetically-sealed(adjective, tight, impervious, hermetic)
1
leaktight(adjective, tight, impervious, hermetic)
1
liquid-tight(adjective, tight, impervious, hermetic)
1
nonleaking(adjective, tight, impervious, hermetic)
1
pressureproof(adjective, tight, impervious, hermetic)
1
pressurised(adjective, tight, impervious, hermetic)
1
pressurized(adjective, tight, impervious, hermetic)
1
sealed-in(adjective, tight, impervious, hermetic)
1
tightly sealed(adjective, tight, impervious, hermetic)
1
totally enclosed(adjective, tight, impervious, hermetic)
1
water-proof(adjective, tight, impervious, hermetic)
0
reclosable(adjective, tight, impervious, hermetic)
0
repellent
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APASmart Define. (2015). impermeable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impermeable/thesaurus/synonyms
ChicagoSmart Define. 2015. "impermeable thesaurus" https://smartdefine.org/impermeable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, impermeable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impermeable/thesaurus/synonyms>.
MLASmart Define. "impermeable thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/impermeable/thesaurus/synonyms>