blockhouse
From Longman Dictionary of Contemporary EnglishRelated topics: Militaryblockhouseblock‧house /ˈblɒkhaʊs $ ˈblɑːk-/ noun [countable] PMa small strong building used as a shelter from enemy gunsExamples from the Corpusblockhouse• On the side of the shed was a blockhouse canteen and some offices.• Anticipating the attacks, de Lattre had strengthened the Red River valley with hundreds of cement blockhouses and new airfields.• Petion had to duck as he preceded the Doctor into an adobe-style blockhouse, which was refreshingly cool inside.