inhalation vs medication

inhalation and medication both are nouns.

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

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

inhalation: a medication to be taken by inhaling it
medication: (medicine) something that treats or prevents or alleviates the symptoms of disease

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

inhalation (noun)	medication (noun)
the act of inhaling; the drawing in of air (or other gases) as in breathing	the act of treating with medicines or remedies
a medication to be taken by inhaling it	(medicine) something that treats or prevents or alleviates the symptoms of disease