clump vs assemble

clump is a noun but assemble is not a noun.

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

As verbs, assemble is a hypernym of clump; that is, assemble is a word with a broader meaning than clump:

Other hypernyms of clump include foregather, forgather, gather, meet.

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

clump (verb)	assemble (verb)
gather or cause to gather into a cluster	create by putting components or members together
walk clumsily	collect in one place
come together as in a cluster or flock	get people together
make or move along with a sound as of a horse's hooves striking the ground