Citadel and Rampart

Citadel noun - A structure or place from which one can resist attack.

Rampart and citadel are semantically related in stronghold topic. In some cases you can use "Rampart" instead a noun "Citadel", when it comes to topics like fortress.

Rampart noun - An embankment built around a space for defensive purposes.

Citadel and rampart are semantically related in stronghold topic. Sometimes you can use "Citadel" instead a noun "Rampart", if it concerns topics such as fortress.