medical specialty vs practice of medicine

medical specialty and practice of medicine both are nouns.

Word	Noun	Adjective	Verb	Adverb
medical specialty	Yes	No	No	No
practice of medicine	Yes	No	No	No

medical specialty (noun)	practice of medicine (noun)
the branches of medical science that deal with nonsurgical techniques	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