dropsy vs hydrops

dropsy and hydrops both are nouns.

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

As nouns, dropsy and hydrops are synonyms defined as:

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

Other synonyms of dropsy include edema, oedema.

dropsy (noun)	hydrops (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