concerto vs serious music

concerto and serious music both are nouns.

Word	Noun	Adjective	Verb	Adverb
concerto	Yes	No	No	No
serious music	Yes	No	No	No

As nouns, serious music is a hypernym of concerto; that is, serious music is a word with a broader meaning than concerto:

concerto: a composition for orchestra and a soloist
serious music: traditional genre of music conforming to an established form and appealing to critical interest and developed musical taste

Other hypernyms of concerto include classical, classical music.

concerto (noun)	serious music (noun)
a composition for orchestra and a soloist	traditional genre of music conforming to an established form and appealing to critical interest and developed musical taste