decolonise vs Australian spelling

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

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

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

decolonise (verb)	Australian spelling (verb)
grant independence to (a former colony)