international organization vs American spelling

international organization and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
international organization	Yes	No	No	No
American spelling	Yes	No	No	No

international organization (noun)	American spelling (noun)
an international alliance involving many different countries	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')