low-level radioactive waste vs medical specialty

low-level radioactive waste and medical specialty both are nouns.

Word	Noun	Adjective	Verb	Adverb
low-level radioactive waste	Yes	No	No	No
medical specialty	Yes	No	No	No

low-level radioactive waste (noun)	medical specialty (noun)
(medicine) radioactive waste consisting of objects that have been briefly exposed to radioactivity (as in certain medical tests)	the branches of medical science that deal with nonsurgical techniques