practice of medicine vs doctor

practice of medicine and doctor both are nouns.

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

practice of medicine (noun)	doctor (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	children take the roles of physician or patient or nurse and pretend they are at the physician's office
	a licensed medical practitioner
	a person who holds Ph.D. degree (or the equivalent) from an academic institution

practice of medicine (verb)	doctor (verb)
	give medical treatment to
	alter and make impure, as with the intention to deceive
	restore by replacing a part or putting together what is torn or broken