bomb shelter
air-raid shelter
bombproof

The first thing he did was order his troops into the city to help the people who were left find bomb shelters.

"He decided that was deep enough for a bomb shelter."

I called my parents and told them to hide in their bomb shelter.

They want the big shot hiding down in the bomb shelter, not us.

They had come to comment on the quality of the bomb shelter under development.

Why is there never an abandoned bomb shelter around when you need one?

Most of the others had found work elsewhere or built personal bomb shelters.

In the basement of the school, there is a bomb shelter.

Arrows on the wall point the way to the bomb shelters, which have already been used several times.

Some children spent much of that time in crowded bomb shelters.