32 entries under proof topic. ×

15
sealed(adjective, tight, closed, impervious)
11
tight(adjective, impervious, sealed, airtight)
8
airtight(adjective, tight, closed, impervious)
8
watertight(adjective, tight, impervious, airtight)
7
hermetical(adjective, tight, impervious)
6
impermeable(adjective, tight, impervious, impenetrable)
5
waterproof(adjective, tight, impervious, airtight)
4
air-tight(adjective, tight, impervious)
4
airproof(adjective, tight, impervious)
3
dampproof(adjective, tight, impervious)
3
pressure-tight(adjective, tight, impervious)
2
gastight(adjective, tight, impervious)
1
air-locked(adjective, tight, impervious)
1
air-proof(adjective, tight, impervious)
1
enclosed(adjective, tight, impervious)
1
gas-tight(adjective, tight, impervious)
1
gas proof(adjective, tight, impervious)
1
hermetically-impervious(adjective, tight, impervious)
1
hermetically-sealed(adjective, tight, impervious)
1
leaktight(adjective, tight, impervious)
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APASmart Define. (2015). hermetic thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/hermetic/thesaurus/synonyms
ChicagoSmart Define. 2015. "hermetic thesaurus" https://smartdefine.org/hermetic/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, hermetic thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/hermetic/thesaurus/synonyms>.
MLASmart Define. "hermetic thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/hermetic/thesaurus/synonyms>