solmization vs solmisation

solmization and solmisation both are nouns.

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

As nouns, solmization and solmisation are synonyms defined as:

solmization and solmisation: a system of naming the notes of a musical scale by syllables instead of letters

solmization (noun)	solmisation (noun)
singing using solfa syllables to denote the notes of the scale of C major	a system of naming the notes of a musical scale by syllables instead of letters
a system of naming the notes of a musical scale by syllables instead of letters