American spelling vs decolonization

American spelling and decolonization both are nouns.

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

American spelling (noun)	decolonization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the action of changing from colonial to independent status