A permanent army post, as distinguished from a temporary camp
A fortified place; fort
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.
One that upholds or defends something, as against neglect or unpopularity:
A large fortified building or group of buildings with thick walls, usually dominating the surrounding country.
The definition of an acropolis is a city, or part of a city or area that is fortified at the top of something, such as the ancient Greek cities.
A person or thing that resembles a tower in height, strength, dominance, etc.
Find another word for citadel. In this page you can discover 10 synonyms, antonyms, idiomatic expressions, and related words for citadel, like: fort, fortress, stronghold, bastion, castle, fortification, acropolis, fastness, manor and tower.