astringent vs medication

astringent and medication both are nouns.

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

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

astringent: a drug that causes contraction of body tissues and canals
medication: (medicine) something that treats or prevents or alleviates the symptoms of disease

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

astringent (noun)	medication (noun)
a drug that causes contraction of body tissues and canals	the act of treating with medicines or remedies
	(medicine) something that treats or prevents or alleviates the symptoms of disease

astringent (adjective)	medication (adjective)
tending to draw together or constrict soft organic tissue
sour or bitter in taste