American spelling vs regularization

American spelling and regularization both are nouns.

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

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