diuretic vs water pill

diuretic and water pill both are nouns.

Word	Noun	Adjective	Verb	Adverb
diuretic	Yes	No	No	No
water pill	Yes	No	No	No

As nouns, diuretic and water pill are synonyms defined as:

diuretic and water pill: any substance that tends to increase the flow of urine, which causes the body to get rid of excess water

Other synonyms of diuretic include diuretic drug.

diuretic (noun)	water pill (noun)
any substance that tends to increase the flow of urine, which causes the body to get rid of excess water	any substance that tends to increase the flow of urine, which causes the body to get rid of excess water