practice of medicine vs relieve

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

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

practice of medicine (noun)	relieve (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)	relieve (verb)
	provide physical relief, as from pain
	provide relief for
	alleviate or remove (pressure or stress) or make less oppressive
	relieve oneself of troubling information
	grant exemption or release to
	lessen the intensity of or calm
	take by stealing
	free from a burden, evil, or distress
	save from ruin, destruction, or harm
	free someone temporarily from his or her obligations
	grant relief or an exemption from a rule or requirement to