medical specialty vs self-limited

medical specialty is a noun but self-limited is not a noun.

Word	Noun	Adjective	Verb	Adverb
medical specialty	Yes	No	No	No
self-limited	No	Yes	No	No

medical specialty (noun)	self-limited (noun)
the branches of medical science that deal with nonsurgical techniques

medical specialty (adjective)	self-limited (adjective)
	relating to a disease that tends to run a definite course without treatment