airtight Synonyms

air-tight hermetic gas-tight burglarproof watertight fail-safe water-repellent bulletproof lightproof unassailable light-tight leakproof padlocked armoured windtight weatherproof waterproof unquestionable undeniable airproof unattackable closed tight damp-proof liquid-tight vacuum-packed unopened stormproof shatterproof sealing rustproof raintight rainproof proofer pressurized leak-proof hermetically sealed foolproof beyond dispute tight sound snug impermeable impenetrable impassable hermetically hermetical gastight flawless firm fireproof