placebo vs medicinal drug

placebo and medicinal drug both are nouns.

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

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

placebo: an innocuous or inert medication; given as a pacifier or to the control group in experiments on the efficacy of a drug
medicinal drug: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of placebo include medicament, medication, medicine.

placebo (noun)	medicinal drug (noun)
(Roman Catholic Church) vespers of the office for the dead	(medicine) something that treats or prevents or alleviates the symptoms of disease
an innocuous or inert medication; given as a pacifier or to the control group in experiments on the efficacy of a drug