solfa syllable vs lah

solfa syllable and lah both are nouns.

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

As nouns, lah is a hyponym of solfa syllable; that is, lah is a word with a more specific, narrower meaning than solfa syllable:

solfa syllable: one of the names for notes of a musical scale in solmization
lah: the syllable naming the sixth (submediant) note of a major or minor scale in solmization

Other hyponyms of solfa syllable include do, doh, ut, ray, re, mi, fa, so, soh, sol, la, si, te, ti.

solfa syllable (noun)	lah (noun)
one of the names for notes of a musical scale in solmization	the syllable naming the sixth (submediant) note of a major or minor scale in solmization