Base, building, bunker, another b word, shelter, home, citadel, so on so forth
Castle
Castellan
The fortress can also be called a citadel. Hope this helps :)
the fortress of soltitude
bastion, bulwark, citadel, fortification, fortress, parapet, stronghold
Germany often refered to it as Fortress Europe.
The attack on the walls of a fortress using ladders is an Escalade.
yep, some writers use citadel to make it sound a little more dramatic
Fortress Louisberg
Mycenae
Parapet.
The fortress of solitude