decolorize vs American spelling

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

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

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

decolorize (verb)	American spelling (verb)
cause to become white or lighter in color