itemisation vs Australian spelling

itemisation and Australian spelling both are nouns.

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

itemisation (noun)	Australian spelling (noun)
the act of making a list of items	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')