fa vs solfa syllable

fa and solfa syllable both are nouns.

Word	Noun	Adjective	Verb	Adverb
fa	Yes	No	No	No
solfa syllable	Yes	No	No	No

As nouns, solfa syllable is a hypernym of fa; that is, solfa syllable is a word with a broader meaning than fa:

fa: the syllable naming the fourth (subdominant) note of the diatonic scale in solmization
solfa syllable: one of the names for notes of a musical scale in solmization

fa (noun)	solfa syllable (noun)
the syllable naming the fourth (subdominant) note of the diatonic scale in solmization	one of the names for notes of a musical scale in solmization