A fortified place; fort
A permanent army post, as distinguished from a temporary camp
The definition of a bastion is a fortified place, or something or someone that holds firm to an idea or principle.
A large fortified building or group of buildings with thick walls, usually dominating the surrounding country.
A person or thing that resembles a tower in height, strength, dominance, etc.
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.
Find another word for citadel. In this page you can discover 14 synonyms, antonyms, idiomatic expressions, and related words for citadel, like: fortress, temple, fort, bastion, castle, watch-tower, mausoleum, rampart, tower, acropolis and stronghold.