Synonyms to bulletproof
airtight, ballproof, bombproof, burglarproof, close, compact, corrosionproof, dampproof, dustproof, dusttight, fast, fire-resisting, fireproof, firm, flameproof, foolproof, gasproof, gastight, hermetic, hermetically sealed, holeproof, impervious to, leakproof, lightproof, lighttight, noiseproof, oilproof, oiltight, proof, proof against, punctureproof, rainproof, raintight, resistant, rustproof, sealed, shatterproof, shellproof, shut fast, smokeproof, smoketight, snug, soundproof, staunch, stormproof, stormtight, tight, water-repellant, waterproof, watertight, weatherproof, windproof, windtight, fire-resistant, fire-retardant, fire-retarded, fireproofed, insulate