gabble vs verbalize

gabble is a noun but verbalize is not a noun.

Word	Noun	Adjective	Verb	Adverb
gabble	Yes	No	Yes	No
verbalize	No	No	Yes	No

As verbs, verbalize is a hypernym of gabble; that is, verbalize is a word with a broader meaning than gabble:

Other hypernyms of gabble include mouth, speak, talk, utter, verbalise.

gabble (noun)	verbalize (noun)
rapid and indistinct speech

gabble (verb)	verbalize (verb)
speak (about unimportant matters) rapidly and incessantly	convert into a verb
	express in speech
	be verbose
	articulate; either verbally or with a cry, shout, or noise