defender vs defend

defender is a noun but defend is not a noun.

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

defender (noun)	defend (noun)
a person who cares for persons or property
a fighter who holds out against attack

defender (verb)	defend (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