thumping vs clump

thumping and clump both are nouns.

Word	Noun	Adjective	Verb	Adverb
thumping	Yes	Yes	No	No
clump	Yes	No	Yes	No

As nouns, thumping and clump are synonyms defined as:

thumping and clump: a heavy dull sound (as made by impact of heavy objects)

Other synonyms of thumping include clunk, thud, thump.

thumping (noun)	clump (noun)
a heavy dull sound (as made by impact of heavy objects)	a heavy dull sound (as made by impact of heavy objects)
	a grouping of a number of similar things
	a compact mass

thumping (adjective)	clump (adjective)
(used informally) very large

thumping (verb)	clump (verb)
	gather or cause to gather into a cluster
	walk clumsily
	come together as in a cluster or flock
	make or move along with a sound as of a horse's hooves striking the ground