'Citadel' definitions:
Definition of 'citadel'
From: WordNet
noun
A stronghold into which people could go for shelter during a battle [syn: bastion, citadel]
Definition of 'Citadel'
From: GCIDE
Synonyms of 'citadel'
From: Moby Thesaurus
- acropolis,
- bastion,
- beachhead,
- blockhouse,
- bridgehead,
- bunker,
- castle,
- donjon,
- fasthold,
- fastness,
- fort,
- fortress,
- garrison,
- garrison house,
- hold,
- keep,
- martello,
- martello tower,
- mote,
- motte,
- peel,
- peel tower,
- pillbox,
- post,
- rath,
- redoubt,
- safehold,
- strong point,
- stronghold,
- tower,
- tower of strength,
- ward