Synonyms for Internment:

n.

condemned, inside, preventive detention, go down, detention, captive, custody, custodial. correctional, life, hard labor, life sentence, extraordinary rendition, life imprisonment. act (noun)
imprisonment.
captivity (noun)
custody, impoundment, imprisonment.
confinement (noun)
detention.
internment (noun)
impounding, imprisonment, poundage, impoundment.

Other synonyms:

correctional, life imprisonment, preventive detention, extraordinary rendition, hard labor, life sentence. captive, condemned, custody. custodial. life, inside. go down. Other relevant words:
correctional, custody, captive, inside, detention.