rondo vs classical music

rondo and classical music both are nouns.

Word	Noun	Adjective	Verb	Adverb
rondo	Yes	No	No	No
classical music	Yes	No	No	No

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

rondo: a musical form that is often the last movement of a sonata
classical music: traditional genre of music conforming to an established form and appealing to critical interest and developed musical taste

Other hypernyms of rondo include classical, serious music.

rondo (noun)	classical music (noun)
a musical form that is often the last movement of a sonata	traditional genre of music conforming to an established form and appealing to critical interest and developed musical taste