rejoicing vs vocalization

rejoicing and vocalization both are nouns.

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

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

Other hypernyms of rejoicing include utterance.

rejoicing (noun)	vocalization (noun)
the utterance of sounds expressing great joy	the sound made by the vibration of vocal folds modified by the resonance of the vocal tract
a feeling of great happiness	the use of uttered sounds for auditory communication

rejoicing (adjective)	vocalization (adjective)
joyful and proud especially because of triumph or success