demonetisation vs Australian spelling

demonetisation and Australian spelling both are nouns.

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

demonetisation (noun)	Australian spelling (noun)
ending something (e.g. gold or silver) as no longer the legal tender of a country	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')