centralizing vs American spelling

centralizing is not a noun while American spelling is a noun.

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

centralizing (noun)	American spelling (noun)
	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

centralizing (adjective)	American spelling (adjective)
tending to draw to a central point