stockade Synonyms

keep captive redoubt rampart prison presidio pound pokey penitentiary pen parapet palisade paling paddock oubliette lockup keep reenforcement reformatory Detention Center fortifications detention camp Walls correctional facility hold hostage hoosegow concentration camp penal institution slammer jailhouse bastille wall stock stoccado jail hutch circumvallation cell casemate can calaboose cage bulwark brig bridewell breastwork boarding blockhouse barrier barricade bar