- Definitions|2
- Thesaurus|437
- Abbreviations|0
| jammed | |
| leak-proof(adjective, impenetrable) | |
| leaktight(adjective, tight, proof, impervious, hermetic) | |
| liquid-tight(adjective, tight, proof, impervious, hermetic) | |
| murky | |
| nonleaking(adjective, tight, proof, impervious, hermetic) | |
| nonpuncturable | |
| obscure | |
| pathless(adjective, closure) | |
| pressureproof(adjective, tight, proof, impervious, hermetic) | |
| pressurised(adjective, tight, proof, impervious, hermetic) | |
| pressurized(adjective, tight, proof, impervious, hermetic) | |
| punctureproof | |
| rubber | |
| rubberized | |
| sealed-in(adjective, tight, proof, impervious, hermetic) | |
| short(adjective, close, solid, fast, substantial) | |
| solidified(hard, solid, rigid, density) | |
| thick-growing | |
| tightly sealed(adjective, tight, proof, impervious, hermetic) |
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| APA | Smart Define. (2015). impermeable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impermeable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impermeable thesaurus" https://smartdefine.org/impermeable/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, impermeable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impermeable/thesaurus/synonyms>. |
| MLA | Smart Define. "impermeable thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/impermeable/thesaurus/synonyms> |