dichotomization vs American spelling

dichotomization and American spelling both are nouns.

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

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