grace note vs musical note

grace note and musical note both are nouns.

Word	Noun	Adjective	Verb	Adverb
grace note	Yes	No	No	No
musical note	Yes	No	No	No

As nouns, musical note is a hypernym of grace note; that is, musical note is a word with a broader meaning than grace note:

grace note: an embellishing note usually written in smaller size
musical note: a notation representing the pitch and duration of a musical sound

Other hypernyms of grace note include note, tone.

grace note (noun)	musical note (noun)
an embellishing note usually written in smaller size	a notation representing the pitch and duration of a musical sound