solfa syllable vs doh

solfa syllable and doh both are nouns.

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

As nouns, doh is a hyponym of solfa syllable; that is, doh 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
doh: the syllable naming the first (tonic) note of any major scale in solmization

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

solfa syllable (noun)	doh (noun)
one of the names for notes of a musical scale in solmization	the syllable naming the first (tonic) note of any major scale in solmization