American spelling vs pluralize

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

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

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

American spelling (verb)	pluralize (verb)
	mark with a grammatical morpheme that indicates plural