WordNet sense 1 (the rapid series of noises made by the parts of a machine):

chattering

WordNet sense 2 (noisy talk):

cackle, yack, yak, yakety-yak, yak

WordNet sense 3 (click repeatedly or uncontrollably):

click

WordNet sense 4 (talk socially without exchanging too much information):

chat, chitchat, confab, confabulate, gossip, jaw, natter, visit, chaffer, claver, chew the fat, shoot the breeze

WordNet sense 5 (speak (about unimportant matters) rapidly and incessantly):

blab, blabber, clack, gabble, gibber, maunder, palaver, piffle, prate, prattle, tattle, tittle-tattle, twaddle