| aversion(noun, defense) | |
| backfire(noun, defense) | |
| battlefront | |
| battlement(defense, fortification, barricade, wall, reinforcement) | |
| bird sanctuary | |
| black hole(noun, expression, idiom, prison) | |
| breastwork(noun, support, defense, fortification, cell) | |
| bridgehead | |
| bridle(noun, prison) | |
| brig(noun, prison) | |
| buffer(noun, defense) | |
| bunker | |
| buttress(noun, support, cover, position, guard) | |
| calaboose | |
| capitol | |
| center | |
| château(noun, hold, keep, fortification, cell) | |
| choky | |
| collar(noun, prison) | |
| colony |
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| APA | Smart Define. (2015). stronghold thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/stronghold/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "stronghold thesaurus" https://smartdefine.org/stronghold/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2015, stronghold thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/stronghold/thesaurus/synonyms>. |
| MLA | Smart Define. "stronghold thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/stronghold/thesaurus/synonyms> |