defensive vs defending

defensive is a noun but defending is not a noun.

Word	Noun	Adjective	Verb	Adverb
defensive	Yes	Yes	No	No
defending	No	Yes	No	No

defensive (noun)	defending (noun)
an attitude of defensiveness

defensive (adjective)	defending (adjective)
intended or appropriate for defending against or deterring aggression or attack	attempting to or designed to prevent an opponent from winning or scoring
attempting to justify or defend in speech or writing