1) Captivity 2) Confinement 3) Execution method 4) Imprisonment 5) Incarceration 6) The state of being imprisoned 1) Captivity 2) Incarceration 3) Internment 
Immurement (from Latin im- `in` and mūrus `wall`; literally `walling in`) is a form of imprisonment, usually for life, in which a person is, for example, locked within an enclosed space and all possible exits turned into impassable walls. This includes instances where people have been enclosed in extremely tight confinement, such as within ...
• (n.) The act iif immuring, or the state of being immured; imprsonment.
Im·mure'ment noun The act of immuring, or the state of being immured; imprisonment. 
the state of being imprisoned