equalization vs American spelling

equalization and American spelling both are nouns.

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

equalization (noun)	American spelling (noun)
the act of making equal or uniform	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')