American spelling vs urbanization

American spelling and urbanization both are nouns.

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

American spelling (noun)	urbanization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the social process whereby cities grow and societies become more urban
	the condition of being urbanized