Australian spelling vs authorisation

Australian spelling and authorisation both are nouns.

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

Australian spelling (noun)	authorisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the act of conferring legality or sanction or formal warrant
	the power or right to give orders or make decisions
	official permission or approval
	a document giving an official instruction or command