appetite suppressant vs drug

appetite suppressant and drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
appetite suppressant	Yes	No	No	No
drug	Yes	No	Yes	No

As nouns, drug is a hypernym of appetite suppressant; that is, drug is a word with a broader meaning than appetite suppressant:

appetite suppressant (noun)	drug (noun)
a drug that suppresses appetite	a substance that is used as a medicine or narcotic

appetite suppressant (verb)	drug (verb)
	administer a drug to
	use recreational drugs