reform school vs reformatory

reform school and reformatory both are nouns.

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

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

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

Other synonyms of reform school include training school.

reform school (noun)	reformatory (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

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