antitussive vs medication

antitussive and medication both are nouns.

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

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

antitussive: any medicine used to suppress or relieve coughing
medication: (medicine) something that treats or prevents or alleviates the symptoms of disease

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

antitussive (noun)	medication (noun)
any medicine used to suppress or relieve coughing	the act of treating with medicines or remedies
	(medicine) something that treats or prevents or alleviates the symptoms of disease