music vs euphony

music and euphony both are nouns.

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

As nouns, music and euphony are synonyms defined as:

music (noun)	euphony (noun)
musical activity (singing or whistling etc.)	any agreeable (pleasing and harmonious) sounds
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