decentralise vs Australian spelling

decentralise is not a noun while Australian spelling is a noun.

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

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

decentralise (verb)	Australian spelling (verb)
make less central