chronic vs medical specialty

chronic is not a noun while medical specialty is a noun.

Word	Noun	Adjective	Verb	Adverb
chronic	No	Yes	No	No
medical specialty	Yes	No	No	No

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

chronic (adjective)	medical specialty (adjective)
being long-lasting and recurrent or characterized by long suffering
persisting for a long time
habitual