antidiuretic vs medication

antidiuretic and medication both are nouns.

Word	Noun	Adjective	Verb	Adverb
antidiuretic	Yes	No	No	No
medication	Yes	No	No	No

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

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

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

antidiuretic (noun)	medication (noun)
a drug that limits the formation of urine	the act of treating with medicines or remedies
	(medicine) something that treats or prevents or alleviates the symptoms of disease