Australian spelling vs decentralising

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

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

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

Australian spelling (adjective)	decentralising (adjective)
	tending away from a central point