Synonyms|230Antonyms|32|Broader|3Narrower|0Related|172
1
costive
1
crammed
1
crammed full
1
crystalline
1
dampproof(adjective, tight, proof, impervious, hermetic)
1
enclosed(adjective, tight, proof, impervious, hermetic)
1
fast
1
gas-tight(adjective, tight, proof, impervious, hermetic)
1
gas proof(adjective, tight, proof, impervious, hermetic)
1
gastight(adjective, tight, proof, impervious, hermetic)
1
gluey
1
gnarled
1
hermetical(adjective, tight, proof, impervious, hermetic)
1
hermetically-impervious(adjective, tight, proof, impervious, hermetic)
1
hermetically-sealed(adjective, tight, proof, impervious, hermetic)
1
holeproof
1
impassive(adjective, unaffected, unyielding, unbending, resistant)
1
impermeableness
1
incomprehensible
1
incompressible(adjective, firm, density)
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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>