Wiktionary
missileproof
a. Resistant to missiles.
Usage examples of "missileproof".
If all that Rambo stuff had worked, you and I wouldn't be sitting in a missileproof mountain eating Thanksgiving dinner from a cafeteria.
A king must be ready to give his life, said the Planetary Commander, making what he thought was an important point, as he spoke from the depths of his own missileproof shelter.