expectorator vs medicinal drug

expectorator and medicinal drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
expectorator	Yes	No	No	No
medicinal drug	Yes	No	No	No

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

expectorator: a medicine promoting expectoration
medicinal drug: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of expectorator include medicament, medication, medicine.

expectorator (noun)	medicinal drug (noun)
a medicine promoting expectoration	(medicine) something that treats or prevents or alleviates the symptoms of disease
a person who spits (ejects saliva or phlegm from the mouth)