| 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: | fortification |
| 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: | stronghold |
| Part of Speech: | noun |
| Definition: | refuge |
| Synonyms: | bastion, bulwark, castle, citadel, fastness, fort, fortification, fortress, garrison, keep, presidio, redoubt |
| Main Entry: | fort |
| Part of Speech: | noun |
| Definition: | stronghold |
| Synonyms: | acropolis, blockhouse, camp, castle, citadel, fastness, fortification, fortress, garrison, redoubt, station |
| Main Entry: | fleetness |
| Part of Speech: | noun |
| Definition: | haste |
| Synonyms: | celerity, expedition, expeditiousness, fastness, hastiness, hurriedness, hurry, hustle, hustling, nimbleness, quickness, rapidity, rapidness, rush, speed, speediness, swiftness |
| Main Entry: | hardness |
| Part of Speech: | noun |
| Definition: | stability |
| Synonyms: | adherence, aplomb, assurance, backbone*, balance, cohesion, constancy, dependability, determination, durability, endurance, establishment, fastness, firmness, immobility, immovability, maturity, permanence, perseverance, resoluteness, security, solidity |