lump vs lumpy

lump is a noun but lumpy is not a noun.

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

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

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

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