What's the noun for jailbreaker? Here's the word you're looking for.
jail
A place or institution for the confinement of persons held in lawful custody or detention, especially for minor offenses or with reference to some future judicial proceeding.
(uncountable) Confinement in a jail.
(horse racing) The condition created by the requirement that a horse claimed in a claiming race not be run at another track for some period of time (usually 30 days).
In dodgeball and related games, the area where players who have been struck by the ball are confined.
“In the high society of jaildom his official standing would be several degrees below zero.”
“The feeling of jaildom deepened around them. Neither had ever seen the inside of a prison, but each felt that this surely was what a prison must be like.”