| foundation | |
| front-line | |
| gabion | |
| guardroom | |
| hill(fortification, wall, embankment, bulwark, rampart) | |
| horn | |
| horn work(expression, idiom, defense) | |
| immunity(noun, cover, position, guard, shield) | |
| lines | |
| magnificent home(noun, expression, stronghold, fortress, fort) | |
| manor(noun, top, stronghold, tower, fortress) | |
| mansion(noun, stronghold, fortress, fort) | |
| minefield | |
| munitions(noun, cover, position, guard, shield) | |
| no-man's-land | |
| outpost | |
| partition(noun, support, protection, fortification, embankment) | |
| position(noun, cover, guard, shield, resistance) | |
| ridge(fortification, wall, embankment, bulwark, rampart) | |
| seat(noun, stronghold, fortress, fort) |
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| APA | Smart Define. (2015). bastion thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/bastion/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "bastion thesaurus" https://smartdefine.org/bastion/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, bastion thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/bastion/thesaurus/synonyms>. |
| MLA | Smart Define. "bastion thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/bastion/thesaurus/synonyms> |