music vs activity

music and activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
music	Yes	No	No	No
activity	Yes	No	No	No

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

music (noun)	activity (noun)
musical activity (singing or whistling etc.)	any specific behavior
punishment for one's actions	the trait of being active; moving or acting rapidly and energetically
any agreeable (pleasing and harmonious) sounds	an organic process that takes place in the body
(music) the sounds produced by singers or musical instruments (or reproductions of such sounds)	a process existing in or produced by nature (rather than by the intent of human beings)
an artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner	the state of being active
	(chemistry) the capacity of a substance to take part in a chemical reaction