antidiabetic drug vs medicament

antidiabetic drug and medicament both are nouns.

Word	Noun	Adjective	Verb	Adverb
antidiabetic drug	Yes	No	No	No
medicament	Yes	No	No	No

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

antidiabetic drug: a drug used to treat diabetes mellitus
medicament: (medicine) something that treats or prevents or alleviates the symptoms of disease

Other hypernyms of antidiabetic drug include medication, medicinal drug, medicine.

antidiabetic drug (noun)	medicament (noun)
a drug used to treat diabetes mellitus	(medicine) something that treats or prevents or alleviates the symptoms of disease