mepacrine vs antimalarial drug

mepacrine and antimalarial drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
mepacrine	Yes	No	No	No
antimalarial drug	Yes	No	No	No

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

mepacrine: a drug (trade name Atabrine) used to treat certain worm infestations and once used to treat malaria
antimalarial drug: a medicinal drug used to prevent or treat malaria

Other hypernyms of mepacrine include antimalarial, anthelminthic, anthelmintic, helminthic, vermifuge.

mepacrine (noun)	antimalarial drug (noun)
a drug (trade name Atabrine) used to treat certain worm infestations and once used to treat malaria	a medicinal drug used to prevent or treat malaria