| security(noun, support, cover, position, guard) |
| shelter(noun, cover, position, guard, shield) |
| shield(noun, cover, position, guard, resistance) |
| tenaille |
| trench(noun, cover, position, guard, shield) |
| vallum |
| wall(noun, cover, position, guard, shield) |
| ward(noun, cover, position, guard, shield) |
| warfare(noun, cover, position, guard, shield) |
| weaponry(noun, cover, position, guard, shield) |
| weapons(noun, cover, position, guard, shield) |
| work |
| acropolis(noun, station, fortification, cell, stronghold) |
| advance work(expression, idiom, defense) |
| alcazar(noun, fortification, cell, stronghold, presidio) |
| alimony(noun, fortification, cell, stronghold, presidio) |
| antechamber(noun, fortification, cell, stronghold, presidio) |
| barbacan |
| board(noun, fortification, cell, stronghold, presidio) |
| bread and butter(noun, expression, idiom, fortification, cell) |