antidiuretic drug vs medicament

antidiuretic drug and medicament both are nouns.

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

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

antidiuretic drug: a drug that limits the formation of urine
medicament: (medicine) something that treats or prevents or alleviates the symptoms of disease

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

antidiuretic drug (noun)	medicament (noun)
a drug that limits the formation of urine	(medicine) something that treats or prevents or alleviates the symptoms of disease