pentaerythritol vs vasodilator

pentaerythritol and vasodilator both are nouns.

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

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

pentaerythritol: a coronary vasodilator (trade name Peritrate) used to treat angina pectoris
vasodilator: a drug that causes dilation of blood vessels

Other hypernyms of pentaerythritol include vasodilative.

pentaerythritol (noun)	vasodilator (noun)
a coronary vasodilator (trade name Peritrate) used to treat angina pectoris	a drug that causes dilation of blood vessels