passing tone vs passing note

passing tone and passing note both are nouns.

Word	Noun	Adjective	Verb	Adverb
passing tone	Yes	No	No	No
passing note	Yes	No	No	No

As nouns, passing tone and passing note are synonyms defined as:

passing tone and passing note: a nonharmonic note inserted for transition between harmonic notes

passing tone (noun)	passing note (noun)
a nonharmonic note inserted for transition between harmonic notes	a nonharmonic note inserted for transition between harmonic notes