lumpy vs lump

lumpy is not a noun while lump is a noun.

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

lumpy (noun)	lump (noun)
	a compact mass
	a large piece of something without definite shape
	an awkward stupid person
	an abnormal protuberance or localized enlargement

lumpy (adjective)	lump (adjective)
having lumps; not smooth and even in texture
like or containing small sticky lumps

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