reformatory vs reform school

reformatory and reform school both are nouns.

Word	Noun	Adjective	Verb	Adverb
reformatory	Yes	Yes	No	No
reform school	Yes	No	No	No

As nouns, reformatory and reform school are synonyms defined as:

reformatory and reform school: correctional institution for the detention and discipline and training of young or first offenders

Other synonyms of reformatory include training school.

reformatory (noun)	reform school (noun)
correctional institution for the detention and discipline and training of young or first offenders	correctional institution for the detention and discipline and training of young or first offenders

reformatory (adjective)	reform school (adjective)
tending to reform