Australian spelling vs decolonisation

Australian spelling and decolonisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
Australian spelling	Yes	No	No	No
decolonisation	Yes	No	No	No

Australian spelling (noun)	decolonisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the action of changing from colonial to independent status