kidney disease vs nephrosis

kidney disease and nephrosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
kidney disease	Yes	No	No	No
nephrosis	Yes	No	No	No

As nouns, kidney disease and nephrosis are synonyms defined as:

Other synonyms of kidney disease include nephropathy, renal disorder.

kidney disease (noun)	nephrosis (noun)
a disease affecting the kidneys	a disease affecting the kidneys
	a syndrome characterized by edema and large amounts of protein in the urine and usually increased blood cholesterol; usually associated with glomerulonephritis or with a complication of various systemic diseases