whistling vs music

whistling and music both are nouns.

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

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

whistling (noun)	music (noun)
the act of whistling a tune	musical activity (singing or whistling etc.)
the act of signalling (e.g., summoning) by whistling or blowing a whistle	punishment for one's actions
the sound made by something moving rapidly or by steam coming out of a small aperture	any agreeable (pleasing and harmonious) sounds
	(music) the sounds produced by singers or musical instruments (or reproductions of such sounds)
	an artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner