- Definitions|1
- Thesaurus|454
- Abbreviations|0
| flawless | |
| gastight(adjective, tight, proof, impervious, hermetic) | |
| invulnerable(adjective, certain) | |
| pressure-tight(adjective, tight, proof, impervious, hermetic) | |
| proof(adjective, tight, impervious, hermetic) | |
| secure(verb, adjective, closed) | |
| shut(verb, adjective, closed, sealed) | |
| close | |
| enclosed(adjective, tight, proof, impervious, hermetic) | |
| firm | |
| hermetically sealed | |
| indisputable(adjective, certain) | |
| pressurized(adjective, tight, proof, impervious, hermetic) | |
| rainproof(adjective, resistant, impervious, watertight, waterproof) | |
| tightly sealed(expression, adjective, idiom, tight, proof) | |
| air-locked(adjective, tight, proof, impervious, hermetic) | |
| air-proof(adjective, tight, proof, impervious, hermetic) | |
| air tight(expression, idiom) | |
| ballproof | |
| blind(adjective, sound, firm, fast, short) |
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| APA | Smart Define. (2015). airtight thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/airtight/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "airtight thesaurus" https://smartdefine.org/airtight/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, airtight thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/airtight/thesaurus/synonyms>. |
| MLA | Smart Define. "airtight thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/airtight/thesaurus/synonyms> |