American spelling vs regularize

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

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

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

American spelling (verb)	regularize (verb)
	make regular or more regular
	bring into conformity with rules or principles or usage; impose regulations