soundproof (v.)
- bombproof
- bulletproof
- fireproof
- foolproof
- insulate
- proof
- tight
- waterproof
- weatherproof
soundproof (adj.)
- airtight
- bombproof
- bulletproof
- burglarproof
- fire-resisting
- fireproof
- flameproof
- foolproof
- hermetic
- leakproof
- proof
- resistant
- rustproof
- shatterproof
- shellproof
- tight
- waterproof
- watertight
- weatherproof
