defense system
defence system

You can get through any defense system in the world.

The child's natural defense system needs this time to start working again.

The defense system will not respond to anything we do.

There is no question that the defense system will create an arms control crisis.

The actual building of a defense system should wait until it is.

However, it is their defense system which makes them so hard to defeat.

Studies show that across the country, public defense systems are failing.

The Guardian may very well have its own defense systems.

The defense system won't be able to shoot at something it doesn't see.

Small talk has suddenly become a very fragile defense system.