medicine vs inject

medicine is a noun but inject is not a noun.

Word	Noun	Adjective	Verb	Adverb
medicine	Yes	No	Yes	No
inject	No	No	Yes	No

medicine (noun)	inject (noun)
the learned profession that is mastered by graduate training in a medical school and that is devoted to preventing or alleviating or curing diseases and injuries
punishment for one's actions
(medicine) something that treats or prevents or alleviates the symptoms of disease
the branches of medical science that deal with nonsurgical techniques

medicine (verb)	inject (verb)
treat medicinally, treat with medicine	give an injection to
	to introduce (a new aspect or element)
	to insert between other elements
	feed intravenously
	take by injection
	force or drive (a fluid or gas) into by piercing