pluralization vs American spelling

pluralization and American spelling both are nouns.

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

pluralization (noun)	American spelling (noun)
the act of pluralizing or attributing plurality to	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')