American spelling vs nitrogenize

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

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

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

American spelling (verb)	nitrogenize (verb)
	treat with nitrogen or a nitrogen compound