medical specialty vs neurotropic

medical specialty is a noun but neurotropic is not a noun.

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

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

medical specialty (adjective)	neurotropic (adjective)
	(of a virus, toxin, or chemical) tending to attack or affect the nervous system preferentially