Australian spelling vs decimalisation

Australian spelling and decimalisation both are nouns.

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

Australian spelling (noun)	decimalisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the act of changing to a decimal system