self-organization vs American spelling

self-organization and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-organization	Yes	No	No	No
American spelling	Yes	No	No	No

self-organization (noun)	American spelling (noun)
organizing yourself (especially organizing your own labor union)	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')