bombproof
1. [ noun ] (housing) a chamber (often underground) reinforced against bombing and provided with food and living facilities; used during air raids
Synonyms: bomb_shelter air-raid_shelter
Related terms: shelter chamber
2. [ adjective ] able to resist the explosive force of bombs and shells
Synonyms: shellproof
Examples:

"bombproof shelter"

Related terms: invulnerable
Similar spelling:   bombardon
  bomber
  bombard