butyl nitrite vs stimulant drug

butyl nitrite and stimulant drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
butyl nitrite	Yes	No	No	No
stimulant drug	Yes	No	No	No

As nouns, stimulant drug is a hypernym of butyl nitrite; that is, stimulant drug is a word with a broader meaning than butyl nitrite:

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

Other hypernyms of butyl nitrite include excitant, stimulant, vasodilative, vasodilator.

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