defend vs defensive

defend is not a noun while defensive is a noun.

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

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

defend (adjective)	defensive (adjective)
	intended or appropriate for defending against or deterring aggression or attack
	attempting to justify or defend in speech or writing

defend (verb)	defensive (verb)
argue or speak in defense of
state or assert
be on the defensive; act against an attack
protect against a challenge or attack
protect or fight for as a champion
fight against or resist strongly
be the defense counsel for someone in a trial