Nouns

(n)clack, clapa sharp abrupt noise as if two objects hit together; may be repeated
(n)clack valve, clack, clapper valvea simple valve with a hinge on one side; allows fluid to flow in only one direction

Verbs

(v)clatter, clack, brattlemake a rattling sound“clattering dishes”
(v)cluck, click, clackmake a clucking sounds, characteristic of hens
(v)chatter, piffle, palaver, prate, tittle-tattle, twaddle, clack, maunder, prattle, blab, gibber, tattle, blabber, gabblespeak (about unimportant matters) rapidly and incessantly