hydrops vs edema

hydrops and edema both are nouns.

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

As nouns, hydrops and edema are synonyms defined as:

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

Other synonyms of hydrops include dropsy, oedema.

hydrops (noun)	edema (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