clumsy person vs lump

clumsy person and lump both are nouns.

Word	Noun	Adjective	Verb	Adverb
clumsy person	Yes	No	No	No
lump	Yes	No	Yes	No

As nouns, lump is a hyponym of clumsy person; that is, lump is a word with a more specific, narrower meaning than clumsy person:

Other hyponyms of clumsy person include butterfingers, duffer, clod, gawk, goon, lout, lubber, lummox, oaf, stumblebum.

clumsy person (noun)	lump (noun)
a person with poor motor coordination	a compact mass
	a large piece of something without definite shape
	an awkward stupid person
	an abnormal protuberance or localized enlargement

clumsy person (verb)	lump (verb)
	group or chunk together in a certain order or place side by side
	put together indiscriminately