WordNet sense 1 (a sharp abrupt noise as if two objects hit together; may be repeated):

clap

WordNet sense 2 (a simple valve with a hinge on one side; allows fluid to flow in only one direction):

clack valve, clapper valve

WordNet sense 3 (make a rattling sound):

clatter, brattle

WordNet sense 4 (make a clucking sounds, characteristic of hens):

click, cluck

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

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