Australian spelling vs decentralisation

Australian spelling and decentralisation both are nouns.

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

Australian spelling (noun)	decentralisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the spread of power away from the center to local branches or governments