water pill vs diuretic drug

water pill and diuretic drug both are nouns.

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

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

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

Other synonyms of water pill include diuretic.

water pill (noun)	diuretic drug (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