verb

Talk rapidly and continuously in a foolish, excited, or incomprehensible way.

they babbled on about their holiday

prattle,rattle on,gabble,chatter,jabber,twitter,go on,run on,prate,ramble,burble,blather,blether,blither,maunder,drivel,patter,yap,jibber-jabber

noun

The sound of people talking simultaneously.

the answers were difficult to hear amid the babble of conversation

clamour,din,racket,confused noise,tumult,uproar,hubbub