American spelling vs naturalization

American spelling and naturalization both are nouns.

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

American spelling (noun)	naturalization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the proceeding whereby a foreigner is granted citizenship
	changing the pronunciation of a borrowed word to agree with the borrowers' phonology
	the introduction of animals or plants to places where they flourish but are not indigenous
	the quality of being brought into conformity with nature