clack vs cluck

clack and cluck both are nouns.

Word	Noun	Adjective	Verb	Adverb
clack	Yes	No	Yes	No
cluck	Yes	No	Yes	No

As verbs, clack and cluck are synonyms defined as:

Other synonyms of clack include click.

clack (noun)	cluck (noun)
a simple valve with a hinge on one side; allows fluid to flow in only one direction	the sound made by a hen (as in calling her chicks)
a sharp abrupt noise as if two objects hit together; may be repeated

clack (verb)	cluck (verb)
speak (about unimportant matters) rapidly and incessantly	make a clucking sounds, characteristic of hens
make a clucking sounds, characteristic of hens
make a rattling sound