babble vs chatter

babble and chatter both are nouns.

Word	Noun	Adjective	Verb	Adverb
babble	Yes	No	Yes	No
chatter	Yes	No	Yes	No

As verbs, chatter is a hypernym of babble; that is, chatter is a word with a broader meaning than babble:

Other hypernyms of babble include blab, blabber, clack, gabble, gibber, maunder, palaver, piffle, prate, prattle, tattle, tittle-tattle, twaddle.

babble (noun)	chatter (noun)
gibberish resembling the sounds of a baby	noisy talk
	the high-pitched continuing noise made by animals (birds or monkeys)
	the rapid series of noises made by the parts of a machine

babble (verb)	chatter (verb)
to talk foolishly	speak (about unimportant matters) rapidly and incessantly
divulge confidential information or secrets	talk socially without exchanging too much information
utter meaningless sounds, like a baby, or utter in an incoherent way	make noise as if chattering away
flow in an irregular current with a bubbling noise	cut unevenly with a chattering tool
	click repeatedly or uncontrollably