pasteurisation vs Australian spelling

pasteurisation and Australian spelling both are nouns.

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

pasteurisation (noun)	Australian spelling (noun)
partial sterilization of foods at a temperature that destroys harmful microorganisms without major changes in the chemistry of the food	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')