agglomeration vs clump

agglomeration and clump both are nouns.

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

As nouns, clump is a hyponym of agglomeration; that is, clump is a word with a more specific, narrower meaning than agglomeration:

Other hyponyms of agglomeration include bunch, cluster, clustering, ball, chunk, clod, glob, lump.

agglomeration (noun)	clump (noun)
the act of collecting in a mass; the act of agglomerating	a heavy dull sound (as made by impact of heavy objects)
a jumbled collection or mass	a grouping of a number of similar things
	a compact mass

agglomeration (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