capitalize vs American spelling

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

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

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

capitalize (verb)	American spelling (verb)
convert (a company's reserve funds) into capital
consider expenditures as capital assets rather than expenses
compute the present value of a business or an income
write in capital letters
draw advantages from
supply with capital, as of a business by using a combination of capital used by investors and debt capital provided by lenders