defense vs American spelling

defense and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
defense	Yes	No	No	No
American spelling	Yes	No	No	No

defense (noun)	American spelling (noun)
(military) military action or resources protecting a country against potential enemies	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
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