diuretic vs drug

diuretic and drug both are nouns.

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

As nouns, drug is a hypernym of diuretic; that is, drug is a word with a broader meaning than diuretic:

diuretic: any substance that tends to increase the flow of urine, which causes the body to get rid of excess water
drug: a substance that is used as a medicine or narcotic

diuretic (noun)	drug (noun)
any substance that tends to increase the flow of urine, which causes the body to get rid of excess water	a substance that is used as a medicine or narcotic

diuretic (verb)	drug (verb)
	administer a drug to
	use recreational drugs