The definition of a stronghold is a place that has been secured tightly in case of attack, or a place where a particular belief or ideology is firmly believed and staunchly defended.
A large fortified building or group of buildings with thick walls, usually dominating the surrounding country.
The definition of a barrier is anything, either natural or manmade, that keeps something from passing through.
An enclosed place or fortified building for military defense, equipped as with earthworks, guns, etc.
Troops stationed in a fort or fortified place
The definition of a rampart is a defensive or protective barrier, especially a protective wall around a castle or city made of stone with a broad top that serves as a walkway.
A breastwork outside a fortification, to defend approaches, etc.
Find another word for fortress. In this page you can discover 14 synonyms, antonyms, idiomatic expressions, and related words for fortress, like: stronghold, castle, barrier, fortification, fort, citadel, bastille, garrison, rampart, redoubt and watch-tower.