fort
noun
[ fɔːt ]
• a fortified building or strategic position.
• "the city was guarded by a ring of forts"
Similar:
fortress,
castle,
citadel,
blockhouse,
burg,
keep,
tower,
donjon,
turret,
stronghold,
redoubt,
fortification,
bastion,
fastness,
alcazar,
hold,
fortalice,
Origin:
late Middle English: from Old French fort or Italian forte, from Latin fortis ‘strong’.