babble vs twaddle

babble and twaddle both are nouns.

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

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

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

babble (noun)	twaddle (noun)
gibberish resembling the sounds of a baby	pretentious or silly talk or writing

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