American spelling vs theorization

American spelling and theorization both are nouns.

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

American spelling (noun)	theorization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the production or use of theories