American spelling vs devitalization

American spelling and devitalization both are nouns.

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

American spelling (noun)	devitalization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the act of reducing the vitality of something