The definition of a barrier is anything, either natural or manmade, that keeps something from passing through.
A large fortified building or group of buildings with thick walls, usually dominating the surrounding country.
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.
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 10 synonyms, antonyms, idiomatic expressions, and related words for fortress, like: fortification, barrier, castle, stronghold, fort, citadel, bastille, garrison, rampart and redoubt.