defence vs defend

defence is a noun but defend is not a noun.

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

defence (noun)	defend (noun)
(military) military action or resources protecting a country against potential enemies
the act of defending someone or something against attack or injury
a defendant's answer or plea denying the truth of the charges against him
protection from harm
a structure used to defend against attack
the justification for some act or belief
the speech act of answering an attack on your assertions
the defendant and his legal advisors collectively
(sports) the team that is trying to prevent the other team from scoring
an organization of defenders that provides resistance against attack
(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires

defence (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