Cleverly thought out, Michael. You may want to check the words below as they all need to be adjectives.
- confined - verb
- imprisoned - adjective
- liberty - noun
- release - noun/verb

this works, but the word, slack detracts from the overall feel. Let me think...

self-reliant - you may like this word better?

This is fab Michael ... and I see from the comments that you got caught out with the whole noun thing too! Bloomin things! lol :-) x
=^.^=