American spelling vs decimalize

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

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

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

American spelling (verb)	decimalize (verb)
	change to the decimal system
	change from fractions to decimals