oedema vs dropsy

oedema and dropsy both are nouns.

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

As nouns, oedema and dropsy are synonyms defined as:

oedema and dropsy: swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities

Other synonyms of oedema include edema, hydrops.

oedema (noun)	dropsy (noun)
swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities	swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities