| Main Entry: | |
| Part of Speech: | noun |
| Definition: | reinforced position |
| Synonyms: | barricade, barrier, bastion, battlement, block, blockhouse, breastwork, buffer, bulwark, castle, citadel, consolidation, defense, earthwork, embattlement, entrenchment, fastness, fort, fortress, garrison, keep, outpost, parapet, preparation, presidio, protection, reinforcement, stockade, strengthening, stronghold, support, wall |
| Main Entry: | bastion |
| Part of Speech: | noun |
| Definition: | support; fortified place |
| Synonyms: | breastwork, bulwark, citadel, defense, fortification, fortress, mainstay, parapet, prop, protection, rock, stronghold, support, tower of strength |
| Antonyms: | weak spot, weakness |
| Main Entry: | castle |
| Part of Speech: | noun |
| Definition: | magnificent home, often for royalty |
| Synonyms: | acropolis, alcazar, château, citadel, donjon, estate house, fasthold, fastness, fort, fortification, fortress, hold, keep, manor, mansion, palace, peel, safehold, seat, stronghold, tower, villa |
| Notes: | castle and chateau derive from Latin castellum, a diminutive form of castrum 'fort'; chateau is the modern French version that has been borrowed into English 'as is' |
| Main Entry: | citadel |
| Part of Speech: | noun |
| Definition: | top, tower |
| Synonyms: | bastion, blockhouse, castle, fastness, fort, fortification, fortress, keep, manor, redoubt, stronghold |
| Main Entry: | defense |
| Part of Speech: | noun |
| Definition: | armament; protection system |
| Synonyms: | aegis, armor, arms, barricade, bastille, bastion, bulwark, buttress, citadel, cover, deterrence, dike, embankment, fastness, fence, fort, fortification, fortress, garrison, guard, immunity, munitions, palisade, parapet, position, protection, rampart, redoubt, resistance, safeguard, security, shelter, shield, stockade, stronghold, trench, wall, ward, warfare, weaponry, weapons |
| Antonyms: | desertion, flight, surrender |
| Main Entry: | fort/fortress |
| Part of Speech: | noun |
| Definition: | stronghold |
| Synonyms: | acropolis, blockhouse, camp, castle, citadel, fastness, fortification, garrison, redoubt, station |
| Main Entry: | garrison |
| Part of Speech: | noun |
| Definition: | military post, fort |
| Synonyms: | barracks, base, camp, citadel, command post, encampment, fortification, fortress, stronghold |
| Main Entry: | installation |
| Part of Speech: | noun |
| Definition: | equipment |
| Synonyms: | base, establishment, fort, fortification, furnishings, lighting, machinery, plant, post, power, station, system, wiring |
| Main Entry: | parapet |
| Part of Speech: | noun |
| Definition: | bulwark |
| Synonyms: | barricade, barrier, bastion, buffet, buttress, defense, embankment, fortification, partition, protection, protective wall, rampart, safeguard |