A defense or safeguard.
A defensive wall or rampart.
A breakwater.
Any means of defence or security.
The planking or plating along the sides of a nautical vessel above her gunwale that reduces the likelihood of seas washing over the gunwales and people being washed overboard.
To fortify something with a wall or rampart.
To provide protection of defense for something.
One who, or that which, defends or protects; defence; protection.
A safe-conduct or passport, especially in time of war.
Something that serves as a guard or protection; a defense.
To escort safely.
To implement safeguarding.
To protect, to keep safe.