hydralazine vs antihypertensive

hydralazine and antihypertensive both are nouns.

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

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

hydralazine: an antihypertensive drug (trade name Apresoline) that dilates blood vessels; used (often with a diuretic) to treat hypertension and congestive heart failure
antihypertensive: a drug that reduces high blood pressure

Other hypernyms of hydralazine include antihypertensive drug, vasodilative, vasodilator.

hydralazine (noun)	antihypertensive (noun)
an antihypertensive drug (trade name Apresoline) that dilates blood vessels; used (often with a diuretic) to treat hypertension and congestive heart failure	a drug that reduces high blood pressure