reformatory

adj

1. Of, pertaining to, or conducive to reform; reformative.

   “Other reformatory schools might not strike that balance between reform and education.”

noun

1. A prison, especially one for juveniles; a reform school.

   “It was the nicest-looking property Elwood had ever seen—a real school, a good one, not the forbidding reformatory he’d conjured the last few weeks.”