Lasix vs water pill

Lasix and water pill both are nouns.

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

As nouns, water pill is a hypernym of Lasix; that is, water pill is a word with a broader meaning than Lasix:

Lasix: commonly used diuretic (trade name Lasix) used to treat hypertension and edema
water pill: any substance that tends to increase the flow of urine, which causes the body to get rid of excess water

Other hypernyms of Lasix include diuretic, diuretic drug.

Lasix (noun)	water pill (noun)
commonly used diuretic (trade name Lasix) used to treat hypertension and edema	any substance that tends to increase the flow of urine, which causes the body to get rid of excess water