anasarca vs oedema

anasarca and oedema both are nouns.

Word	Noun	Adjective	Verb	Adverb
anasarca	Yes	No	No	No
oedema	Yes	No	No	No

As nouns, oedema is a hypernym of anasarca; that is, oedema is a word with a broader meaning than anasarca:

anasarca: generalized edema with accumulation of serum in subcutaneous connective tissue
oedema: swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities

Other hypernyms of anasarca include dropsy, edema, hydrops.

anasarca (noun)	oedema (noun)
generalized edema with accumulation of serum in subcutaneous connective tissue	swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities