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.
An expedient to secure protection or defence.
A state of safety, protection or shelter.
A refuge island.
A place providing safety, protection or shelter.
Something or someone turned to for safety or assistance; a recourse or resort.
To return to a place of shelter.