65 entries under fortification topic. ×

17
keep(noun, place, free, refuge)
14
cell(noun, place, keep, field)
12
slammer(noun, free, slang, can)
6
pokey(noun, keep, free, slang)
5
bastille(noun, verb, hold, keep, sentence)
5
jailhouse(noun, keep, cell, stronghold)
5
stronghold(noun, cell, presidio, sustainment)
5
tower(noun, place, cell, stronghold)
3
donjon(noun, cell, stronghold, presidio)
3
guardhouse(noun, pen, cell, stronghold)
1
acropolis(noun, refuge, cell, stronghold)
1
bullpen(noun, keep, cell, stronghold)
1
castle(noun, cell, stronghold, presidio)
1
citadel(noun, cell, stronghold, presidio)
1
statesville(noun, pen, cell, stronghold)
1
up the river(noun, expression, idiom, keep)
0
alcazar(noun, cell, stronghold, presidio)
0
alimony(noun, cell, stronghold, presidio)
0
antechamber(noun, cell, stronghold, presidio)
0
barbican(noun, cell, stronghold, presidio)
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APASmart Define. (2015). prison thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/prison/thesaurus/synonyms
ChicagoSmart Define. 2015. "prison thesaurus" https://smartdefine.org/prison/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, prison thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/prison/thesaurus/synonyms>.
MLASmart Define. "prison thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/prison/thesaurus/synonyms>