Nouns

(n)babble, babbling, lallationgibberish resembling the sounds of a baby

Verbs

(v)babbleutter meaningless sounds, like a baby, or utter in an incoherent way“The old man is only babbling — don't pay attention”
(v)babble, blather, smatter, blether, blitherto talk foolishly“The two women babbled and crooned at the baby”
(v)ripple, babble, guggle, burble, bubble, gurgleflow in an irregular current with a bubbling noise“babbling brooks”
(v)spill the beans, let the cat out of the bag, talk, tattle, blab, peach, babble, sing, babble out, blab outdivulge confidential information or secrets“Be careful — his secretary talks”