medical specialty vs iatrogenic

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

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

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

medical specialty (adjective)	iatrogenic (adjective)
	induced by a physician's words or therapy (used especially of a complication resulting from treatment)