antidiarrheal vs medication

antidiarrheal and medication both are nouns.

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

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

antidiarrheal: a drug used to control or stop diarrhea
medication: (medicine) something that treats or prevents or alleviates the symptoms of disease

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

antidiarrheal (noun)	medication (noun)
a drug used to control or stop diarrhea	the act of treating with medicines or remedies
	(medicine) something that treats or prevents or alleviates the symptoms of disease