| certified(adjective, certain, definite, sure, approved) | |
| close | |
| crocked | |
| endorsed | |
| filled | |
| firm | |
| fixed(verb, adjective, calm, quiet, smooth) | |
| hermetical(adjective, tight, proof, impervious, hermetic) | |
| impassable(adjective, unaffected, unyielding, unbending, resistant) | |
| impenetrable(adjective, fast, short, unaffected, unyielding) | |
| impressed | |
| imprinted | |
| jammed(verb, closed) | |
| notarized(adjective, permitted, sanctioned, recognized, signed) | |
| obstructed(adjective, closed) | |
| printed | |
| rainproof(adjective, resistant, impervious) | |
| secret(secret, unintelligibility) | |
| secure(adjective, set, solid, certain, sure) | |
| still(adjective, calm, quiet, tranquil, silent) |
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| APA | Smart Define. (2015). sealed thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sealed/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "sealed thesaurus" https://smartdefine.org/sealed/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, sealed thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sealed/thesaurus/synonyms>. |
| MLA | Smart Define. "sealed thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/sealed/thesaurus/synonyms> |