American spelling vs relativization

American spelling and relativization both are nouns.

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

American spelling (noun)	relativization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the act or result of making relative or regarding as relative rather than absolute.