regularization vs American spelling

regularization and American spelling both are nouns.

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

regularization (noun)	American spelling (noun)
the act of bringing to uniformity; making regular	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
the condition of having been made regular (or more regular)