bombproof
bombp·roof
noun
1.
a chamber (often underground) reinforced against bombing and provided with food and living facilities; used during air raids
adjective
Origin
From bomb + -proof.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.