diuretic vs diuretic drug

diuretic and diuretic drug both are nouns.

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

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

diuretic 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 diuretic include water pill.

diuretic (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