Synonyms for Babble (same or very similar meaning)
WordNet sense 1 (gibberish resembling the sounds of a baby):
lallation, babblingWordNet sense 2 (flow in an irregular current with a bubbling noise):
bubble, burble, gurgle, ripple, guggleWordNet sense 3 (to talk foolishly):
blather, blether, blither, smatterWordNet sense 4 (divulge confidential information or secrets):
blab, peach, sing, talk, tattle, spill the beans, babble out, blab out, let the cat out of the bagFrom the ODE community, based on WordNetadd/edit