sol vs solfa syllable

sol and solfa syllable both are nouns.

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

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

sol: the syllable naming the fifth (dominant) note of any musical scale in solmization
solfa syllable: one of the names for notes of a musical scale in solmization

sol (noun)	solfa syllable (noun)
the syllable naming the fifth (dominant) note of any musical scale in solmization	one of the names for notes of a musical scale in solmization
a colloid that has a continuous liquid phase in which a solid is suspended in a liquid