edema vs lump

edema and lump both are nouns.

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

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

edema: swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities
lump: an abnormal protuberance or localized enlargement

Other hypernyms of edema include puffiness, swelling.

edema (noun)	lump (noun)
swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities	a compact mass
	a large piece of something without definite shape
	an awkward stupid person
	an abnormal protuberance or localized enlargement

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