American spelling vs lexicalize

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

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

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

American spelling (verb)	lexicalize (verb)
	make or coin into a word or accept a new word into the lexicon of a language