reorganisation vs Australian spelling

reorganisation and Australian spelling both are nouns.

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

reorganisation (noun)	Australian spelling (noun)
the imposition of a new organization; organizing differently (often involving extensive and drastic changes)	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')