| castle(noun, fortification, cell, stronghold, presidio) |
| acropolis(noun, hold, keep, fortification, cell) |
| bastion(noun, stronghold, fortress, fort) |
| blockhouse(noun, fortification, cell, stronghold, presidio) |
| fasthold(noun, hold, keep, fortification, cell) |
| fort(noun, hold, keep, stronghold, seat) |
| fortress(noun, hold, keep, stronghold, seat) |
| hold(noun, keep, stronghold, seat, fortress) |
| keep(noun, hold, fortification, cell, stronghold) |
| peel(noun, hold, keep, stronghold, seat) |
| stronghold(noun, hold, keep, fortification, cell) |
| tower(noun, hold, keep, fortification, cell) |
| alcazar(noun, hold, keep, fortification, cell) |
| asylum |
| beachhead |
| bird sanctuary |
| bridgehead |
| bunker |
| château(noun, hold, keep, fortification, cell) |
| donjon(noun, hold, keep, fortification, cell) |