medical specialty vs radiation therapy

medical specialty and radiation therapy both are nouns.

Word	Noun	Adjective	Verb	Adverb
medical specialty	Yes	No	No	No
radiation therapy	Yes	No	No	No

medical specialty (noun)	radiation therapy (noun)
the branches of medical science that deal with nonsurgical techniques	(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance