3
blockhouse
3
chateau(noun, hold, keep, stronghold, seat)
3
guard(noun, support, cover, position, shield)
3
military base(noun, expression, quarters, barracks)
3
post
3
shield(noun, cover, position, guard, resistance)
3
station
2
refuge(noun, place, keep, protection, defense)
2
beachhead
2
acropolis(noun, hold, keep, fortification, stronghold)
2
alcazar(noun, hold, keep, stronghold, seat)
2
armor(noun, cover, position, guard, shield)
2
barricade(noun, cover, position, guard, shield)
2
base(noun, quarters, barracks)
2
bastille(noun, cover, position, guard, shield)
2
camp(noun, fortification, stronghold, quarters, barracks)
2
command post(noun, expression, quarters, bunker, barracks)
2
cover(noun, position, guard, shield, resistance)
2
fasthold(noun, hold, keep, stronghold, seat)
2
martello tower(expression, idiom, defense)
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APASmart Define. (2015). fortress thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/fortress/thesaurus/synonyms
ChicagoSmart Define. 2015. "fortress thesaurus" https://smartdefine.org/fortress/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, fortress thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/fortress/thesaurus/synonyms>.
MLASmart Define. "fortress thesaurus" 15 May 2015. Web. 27 September 2026. <https://smartdefine.org/fortress/thesaurus/synonyms>