capitalization vs American spelling

capitalization and American spelling both are nouns.

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

capitalization (noun)	American spelling (noun)
the act of capitalizing on an opportunity	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
the sale of capital stock
an estimation of the value of a business
writing in capital letters