parenteral vs medical specialty

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

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

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

parenteral (adjective)	medical specialty (adjective)
located outside the alimentary tract
administered by means other than through the alimentary tract (as by intramuscular or intravenous injection)