babble vs gibber

babble and gibber both are nouns.

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

As nouns, gibber is a hypernym of babble; that is, gibber is a word with a broader meaning than babble:

Other hypernyms of babble include gibberish.

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

babble (noun)	gibber (noun)
gibberish resembling the sounds of a baby	unintelligible talking

babble (verb)	gibber (verb)
to talk foolishly	speak (about unimportant matters) rapidly and incessantly
divulge confidential information or secrets	chatter inarticulately; of monkeys
utter meaningless sounds, like a baby, or utter in an incoherent way
flow in an irregular current with a bubbling noise