minoxidil vs vasodilator

minoxidil and vasodilator both are nouns.

Word	Noun	Adjective	Verb	Adverb
minoxidil	Yes	No	No	No
vasodilator	Yes	No	No	No

As nouns, vasodilator is a hypernym of minoxidil; that is, vasodilator is a word with a broader meaning than minoxidil:

minoxidil: a vasodilator (trade name Loniten) used to treat severe hypertension; one side effect is hirsutism so it is also sold (trade name Rogaine) as a treatment for male-patterned baldness
vasodilator: a drug that causes dilation of blood vessels

Other hypernyms of minoxidil include vasodilative.

minoxidil (noun)	vasodilator (noun)
a vasodilator (trade name Loniten) used to treat severe hypertension; one side effect is hirsutism so it is also sold (trade name Rogaine) as a treatment for male-patterned baldness	a drug that causes dilation of blood vessels