citadel /sitˈə-dəl/

1. A fortress in or near a city
2. The place where the guns are kept in a warship
3. In the Salvation Army, the hall in which meetings are held

• firebreak
• heterotaxies
• heterotaxis
• heterotaxy
• heterothallic
• heterothallies
• heterothallism
• heterothallisms
• heterothally
• heterothermal
• heterotic
• heterotopia
• heterotopias
• heterotopic
• heterotroph
• heterotrophic
• heterotrophies
• heterotrophs
• heterotrophy
• heterotypic
• heterousian
• heterousians
• heterozygosities
• heterozygosity
• heterozygote