antibacterial vs medicinal drug

antibacterial and medicinal drug both are nouns.

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

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

antibacterial: any drug that destroys bacteria or inhibits their growth
medicinal drug: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of antibacterial include medicament, medication, medicine.

antibacterial (noun)	medicinal drug (noun)
any drug that destroys bacteria or inhibits their growth	(medicine) something that treats or prevents or alleviates the symptoms of disease

antibacterial (adjective)	medicinal drug (adjective)
destroying bacteria or inhibiting their growth