American spelling vs systemize

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

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

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

American spelling (verb)	systemize (verb)
	arrange according to a system or reduce to a system