American spelling vs dichotomization

American spelling and dichotomization both are nouns.

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

American spelling (noun)	dichotomization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the act of dividing into two sharply different categories