Synonyms of castle

castle

noun

ˈka-səl 

1

as in fortress

a structure or place from which one can resist attack

the implacable attackers placed the castle under a prolonged siege

Synonyms & Similar Words

• fortress
• stronghold
• citadel
• fortification
• bastion
• fort
• parapet
• rampart
• redoubt
• bunker
• fastness
• hold
• battlement
• earthwork
• breastwork
• bulwark
• blockhouse
• dugout
• embattlement
• garrison house
• alcazar
• casbah

2

as in mansion

a large impressive residence

the mining tycoon built a magnificent castle on the hill overlooking the town

Synonyms & Similar Words

• mansion
• manor
• hacienda
• palace
• villa
• estate
• house
• housing
• château
• hall
• manse
• manor house
• home
• residency
• penthouse
• dwelling
• abode
• roof
• showplace
• domicile
• hearth
• place
• lodging(s)
• nest
• habitation
• country house
• suite
• great house
• pad
• town house
• salon
• aerie
• quarter(s)
• countryseat

Example Sentences

Recent Examples of castle

There’s a section dedicated to coffee makers of many sizes and colors; reproductions of El Morro castle with a small slot for a paper roll that tells the story of the fortress; and maracas made in Cuba by artisans. — Sarah Moreno august 7, Miami Herald, 7 Aug. 2026

Choose a walk through the chalky Chiltern Hills, or make the 30-minute drive to Windsor Castle; a bastion of British royalty, it was founded in the 11th century and is the oldest inhabited castle in the world. — Katie Silcox, Vogue, 6 Aug. 2026

The event included a bounce castle, food truck, pony rides, face-painting, the Aurora Public Library bookmobile and more. — David Sharos, Chicago Tribune, 5 Aug. 2026

John Camacho Vidal, wine director at Terra Brooklyn, attributes part of Barolo’s allure to its royal history, with vineyards surrounding fairytale castles. — Mike Desimone, Robb Report, 2 Aug. 2026

Phrases Containing castle

• castle in Spain
• castle in the air