American spelling vs conventionalize

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

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

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

American spelling (verb)	conventionalize (verb)
	make conventional or adapt to conventions
	represent according to a conventional style