motorization vs American spelling

motorization and American spelling both are nouns.

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

motorization (noun)	American spelling (noun)
the act of motorizing (equipping with motors or with motor vehicles)	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')