American spelling vs motorization

American spelling and motorization both are nouns.

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

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