Serpasil vs antihypertensive

Serpasil and antihypertensive both are nouns.

Word	Noun	Adjective	Verb	Adverb
Serpasil	Yes	No	No	No
antihypertensive	Yes	No	No	No

As nouns, antihypertensive is a hypernym of Serpasil; that is, antihypertensive is a word with a broader meaning than Serpasil:

Serpasil: antihypertensive consisting of an alkaloid extracted from the plant Rauwolfia serpentina (trade names Raudixin or Rau-Sed or Sandril or Serpasil)
antihypertensive: a drug that reduces high blood pressure

Other hypernyms of Serpasil include antihypertensive drug.

Serpasil (noun)	antihypertensive (noun)
antihypertensive consisting of an alkaloid extracted from the plant Rauwolfia serpentina (trade names Raudixin or Rau-Sed or Sandril or Serpasil)	a drug that reduces high blood pressure