resound vs clack

resound is not a noun while clack is a noun.

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

As verbs, clack is a hyponym of resound; that is, clack is a word with a more specific, narrower meaning than resound:

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

resound (verb)	clack (verb)
emit a noise	speak (about unimportant matters) rapidly and incessantly
ring or echo with sound	make a clucking sounds, characteristic of hens
	make a rattling sound