croaking vs vocalization

croaking and vocalization both are nouns.

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

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

Other hypernyms of croaking include utterance.

croaking (noun)	vocalization (noun)
a harsh hoarse utterance (as of a frog)	the sound made by the vibration of vocal folds modified by the resonance of the vocal tract
	the use of uttered sounds for auditory communication