oxidisation vs Australian spelling

oxidisation and Australian spelling both are nouns.

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

oxidisation (noun)	Australian spelling (noun)
the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')