pluralize vs American spelling

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

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

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

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