pasteurise vs Australian spelling

pasteurise is not a noun while Australian spelling is a noun.

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

pasteurise (noun)	Australian spelling (noun)
	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')

pasteurise (verb)	Australian spelling (verb)
heat food in order to kill harmful microorganisms