American spelling vs decolonize

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

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

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

American spelling (verb)	decolonize (verb)
	grant independence to (a former colony)