Synonyms|229Antonyms|5|Broader|8Narrower|0Related|57
2
penal institution(noun, facility)
2
penal settlement(expression, idiom, prison)
2
pound(noun, prison)
2
sponging house(expression, idiom, prison)
2
stronghold(noun, prison)
2
vault(noun, container, jail, chamber, cage)
1
alcatraz(noun, prison)
1
all sewn up(expression, idiom, store, trust, confidence)
1
authoritativeness(noun, store, trust, confidence, assurance)
1
belief(noun, store, trust, confidence, assurance)
1
big house(noun, free, slang)
1
borstal
1
borstal institution
1
bridle(noun, prison)
1
bucket
1
caging
1
certitude(noun, store, trust, confidence, assurance)
1
check
1
choky
1
cinch(noun, store, trust, confidence, assurance)
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APASmart Define. (2015). lockup thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/lockup/thesaurus/synonyms
ChicagoSmart Define. 2015. "lockup thesaurus" https://smartdefine.org/lockup/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, lockup thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/lockup/thesaurus/synonyms>.
MLASmart Define. "lockup thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/lockup/thesaurus/synonyms>