sing vs music

sing is not a noun while music is a noun.

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

sing (noun)	music (noun)
	musical activity (singing or whistling etc.)
	punishment for one's actions
	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

sing (verb)	music (verb)
make a whining, ringing, or whistling sound
divulge confidential information or secrets
to make melodious sounds
produce tones with the voice
deliver by singing