diuretic drug vs water pill

diuretic drug and water pill both are nouns.

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

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

diuretic drug 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 drug include diuretic.

diuretic drug (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