supertonic vs musical note

supertonic and musical note both are nouns.

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

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

supertonic: (music) the second note of a diatonic scale
musical note: a notation representing the pitch and duration of a musical sound

Other hypernyms of supertonic include note, tone.

supertonic (noun)	musical note (noun)
(music) the second note of a diatonic scale	a notation representing the pitch and duration of a musical sound