nugget vs lump

nugget and lump both are nouns.

Word	Noun	Adjective	Verb	Adverb
nugget	Yes	No	No	No
lump	Yes	No	Yes	No

As nouns, lump is a hypernym of nugget; that is, lump is a word with a broader meaning than nugget:

nugget: a solid lump of a precious metal (especially gold) as found in the earth
lump: a large piece of something without definite shape

Other hypernyms of nugget include hunk.

nugget (noun)	lump (noun)
a solid lump of a precious metal (especially gold) as found in the earth	a compact mass
	a large piece of something without definite shape
	an awkward stupid person
	an abnormal protuberance or localized enlargement

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