American spelling vs decarburize

American spelling is a noun but decarburize is not a noun.

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

American spelling (noun)	decarburize (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

American spelling (verb)	decarburize (verb)
	remove carbon from (an engine)