Australian spelling vs authorise

Australian spelling is a noun but authorise is not a noun.

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

Australian spelling (noun)	authorise (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')

Australian spelling (verb)	authorise (verb)
	grant authorization or clearance for
	give or delegate power or authority to