defensive barrier
- wallVertical enclosing structure
- fortificationStrengthening defenses or nutrients
- rampartFortified defensive wall
- shieldHandheld defensive armor
- bulwarkDefensive fortification or safeguard
barricade · fortress · moat · bunker · trench · parapet · stockade · palisade · blockade · embankment · sandbags · armor · citadel · bastion · stronghold · buffer · fence · garrison
protective function
defensive barriervulnerability
Openness to harm
siege engine · exposed flank · battering ram · weak point · security hole
openness vs. closure
defensive barrierpassageway
Enclosed route between spaces
entry point · open door · gateway · entrance · corridor
vulnerability
defensive barriervulnerability
Openness to harm
weak point · soft target · open ground · no man's land · blind spot