Exact Match:
- hermetic
- completely sealed; completely airtight
Synonyms:
- abstruse,
- airtight,
- arcane,
- ballproof,
- bombproof,
- bulletproof,
- burglarproof,
- cabalistic,
- censored,
- classified,
- cloistered,
- close,
- closed,
- compact,
- concealed,
- corrosionproof,
- cryptic,
- dampproof,
- dark,
- deep,
- dustproof,
- dusttight,
- enigmatic,
- esoteric,
- fast,
- fire-resisting,
- fireproof,
- firm,
- flameproof,
- foolproof,
- gasproof,
- gastight,
- heavy,
- hermetical,
- hermetically sealed,
- hidden,
- holeproof,
- hush-hush,
- impervious,
- impervious to,
- latent,
- leakproof,
- lightproof,
- lighttight,
- mysterious,
- noiseproof,
- occult,
- oilproof,
- oiltight,
- profound,
- proof,
- proof against,
- punctureproof,
- rainproof,
- raintight,
- recluse,
- resistant,
- restricted,
- rustproof,
- sealed,
- secluse,
- seclusive,
- secret,
- sequestered,
- shatterproof,
- shellproof,
- shut fast,
- smokeproof,
- smoketight,
- smothered,
- snug,
- soundproof,
- staunch,
- stifled,
- stormproof,
- stormtight,
- suppressed,
- tight,
- top secret,
- ulterior,
- unbreatheable,
- under security,
- under wraps,
- undisclosable,
- undisclosed,
- undivulgable,
- undivulged,
- unrevealable,
- unrevealed,
- unspoken,
- untellable,
- untold,
- unutterable,
- unuttered,
- unwhisperable,
- water-repellant,
- waterproof,
- watertight,
- weatherproof,
- windproof,
- windtight