Rogaine vs vasodilator

Rogaine and vasodilator both are nouns.

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

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

Rogaine: 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 Rogaine include vasodilative.

Rogaine (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