clunk vs thump

clunk and thump both are nouns.

Word	Noun	Adjective	Verb	Adverb
clunk	Yes	No	Yes	No
thump	Yes	No	Yes	No

As nouns, clunk and thump are synonyms defined as:

clunk and thump: a heavy dull sound (as made by impact of heavy objects)

Other synonyms of clunk include clump, thud, thumping.

clunk (noun)	thump (noun)
a heavy dull sound (as made by impact of heavy objects)	a heavy blow with the hand
	a heavy dull sound (as made by impact of heavy objects)

clunk (verb)	thump (verb)
make or move along with a sound as of a horse's hooves striking the ground	hit hard with the hand, fist, or some heavy instrument
	move rhythmically
	make a dull sound