reform school vs training school

reform school and training school both are nouns.

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

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

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

Other synonyms of reform school include reformatory.

reform school (noun)	training 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
	a school providing practical vocational and technical training