Prison
Prison noun - A place of confinement for persons held in lawful custody.
Secure unit and prison are semantically related. In some cases you can use "Secure unit" instead a noun "Prison".
Secure unit
Prison and secure unit are semantically related. You can use "Prison" instead a noun phrase "Secure unit".
Mutual synonyms
Cite this Source
Secure unit and Prison. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/prison/secure_unit
Prison & Secure unit. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/prison/secure_unit>.
Secure unit or Prison. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/prison/secure_unit.
Google Ngram Viewer shows how "prison" and "secure unit" have occurred on timeline