defend vs defender

defend is not a noun while defender is a noun.

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

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

defend (verb)	defender (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