naturalise vs Australian spelling

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

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

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

naturalise (verb)	Australian spelling (verb)
make into a citizen
make more natural or lifelike
adopt to another place
adapt (a wild plant or unclaimed land) to the environment