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

• thwarts
• thwartship
• thwartships
• thwartways
• thwartwise
• thy
• Thyestean
• Thyestian
• thyine
• thylacine
• thylacines
• thylakoid
• thylose
• thyloses
• thylosis
• thyme
• thymectomies
• thymectomy
• Thymelaeaceae
• thymelaeaceous
• thymes
• thymi
• thymic
• thymidine
• thymidines