isobutyl nitrite vs excitant

isobutyl nitrite and excitant both are nouns.

Word	Noun	Adjective	Verb	Adverb
isobutyl nitrite	Yes	No	No	No
excitant	Yes	Yes	No	No

As nouns, excitant is a hypernym of isobutyl nitrite; that is, excitant is a word with a broader meaning than isobutyl nitrite:

isobutyl nitrite: a colorless pungent liquid sometimes used as a stimulant drug by drug abusers
excitant: a drug that temporarily quickens some vital process

Other hypernyms of isobutyl nitrite include stimulant, stimulant drug, vasodilative, vasodilator.

isobutyl nitrite (noun)	excitant (noun)
a colorless pungent liquid sometimes used as a stimulant drug by drug abusers	a drug that temporarily quickens some vital process

isobutyl nitrite (adjective)	excitant (adjective)
	(of drugs e.g.) able to excite or stimulate