solmization vs solfeggio

solmization and solfeggio both are nouns.

Word	Noun	Adjective	Verb	Adverb
solmization	Yes	No	No	No
solfeggio	Yes	No	No	No

As nouns, solmization and solfeggio are synonyms defined as:

solmization and solfeggio: singing using solfa syllables to denote the notes of the scale of C major

Other synonyms of solmization include solfege.

solmization (noun)	solfeggio (noun)
singing using solfa syllables to denote the notes of the scale of C major	a voice exercise; singing scales or runs to the same syllable
a system of naming the notes of a musical scale by syllables instead of letters	singing using solfa syllables to denote the notes of the scale of C major