medical specialty vs invasive

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

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

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

medical specialty (adjective)	invasive (adjective)
	marked by a tendency to spread especially into healthy tissue
	relating to a technique in which the body is entered by puncture or incision
	gradually intrusive without right or permission
	involving invasion or aggressive attack