practice of medicine vs administer

practice of medicine is a noun but administer is not a noun.

Word	Noun	Adjective	Verb	Adverb
practice of medicine	Yes	No	No	No
administer	No	No	Yes	No

practice of medicine (noun)	administer (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

practice of medicine (verb)	administer (verb)
	give or apply (medications)
	administer or bestow, as in small portions
	perform (a church sacrament) ritually
	work in an administrative capacity; supervise or be in charge of
	direct the taking of