professional organization vs American spelling

professional organization and American spelling both are nouns.

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

professional organization (noun)	American spelling (noun)
an organization of and for professional people	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')