32 entries under hermetic topic. ×

11
tight(adjective, close, solid, short, substantial)
8
waterproof(adjective, water, tight, proof, impervious)
7
sealed(adjective, tight, proof, impervious, impenetrable)
7
watertight(adjective, tight, proof, impervious, impenetrable)
6
airtight(adjective, tight, proof, impervious, impenetrable)
4
proof(adjective, tight, impervious)
3
pressure-tight(adjective, tight, proof, impervious)
2
air-tight(adjective, tight, proof, impervious)
2
retentive(adjective, tight, proof, impervious)
2
water-tight(adjective, tight, proof, impervious)
1
air-locked(adjective, tight, proof, impervious)
1
air-proof(adjective, tight, proof, impervious)
1
airproof(adjective, tight, proof, impervious)
1
dampproof(adjective, tight, proof, impervious)
1
enclosed(adjective, tight, proof, impervious)
1
gas-tight(adjective, tight, proof, impervious)
1
gas proof(adjective, tight, proof, impervious)
1
gastight(adjective, tight, proof, impervious)
1
hermetical(adjective, tight, proof, impervious)
1
hermetically-impervious(adjective, tight, proof, impervious)
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APASmart Define. (2015). impermeable thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/impermeable/thesaurus/synonyms
ChicagoSmart Define. 2015. "impermeable thesaurus" https://smartdefine.org/impermeable/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, impermeable thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/impermeable/thesaurus/synonyms>.
MLASmart Define. "impermeable thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/impermeable/thesaurus/synonyms>