pronunciation vs vocalization

pronunciation and vocalization both are nouns.

Word	Noun	Adjective	Verb	Adverb
pronunciation	Yes	No	No	No
vocalization	Yes	No	No	No

As nouns, vocalization is a hypernym of pronunciation; that is, vocalization is a word with a broader meaning than pronunciation:

Other hypernyms of pronunciation include utterance.

pronunciation (noun)	vocalization (noun)
the manner in which someone utters a word	the sound made by the vibration of vocal folds modified by the resonance of the vocal tract
the way a word or a language is customarily spoken	the use of uttered sounds for auditory communication