American spelling vs centralization

American spelling and centralization both are nouns.

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

American spelling (noun)	centralization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the act of consolidating power under a central control
	gathering to a center