vocational school vs Gymnasium

vocational school and Gymnasium both are nouns.

Word	Noun	Adjective	Verb	Adverb
vocational school	Yes	No	No	No
Gymnasium	Yes	No	No	No

As nouns, Gymnasium is a hypernym of vocational school; that is, Gymnasium is a word with a broader meaning than vocational school:

vocational school: a secondary school teaching the skilled trades
Gymnasium: a school for students intermediate between elementary school and college; usually grades 9 to 12

Other hypernyms of vocational school include lycee, lyceum, middle school, secondary school.

vocational school (noun)	Gymnasium (noun)
a secondary school teaching the skilled trades	a school for students intermediate between elementary school and college; usually grades 9 to 12