Citadel has 2 different meanings across 1 category:
Noun
Noun
1
a stronghold into which people could go for shelter during a battle
"During the siege, the villagers retreated to the ancient citadel where they hoped to stay safe from the enemy's attacks."
2
A strong fortress that sits high above a city.
"The ancient citadel perched atop the rocky hill overlooked the bustling streets of the valley below."
Broader Terms (hypernyms)
Narrower Terms (hyponyms)