depressurise vs Australian spelling

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

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

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

depressurise (verb)	Australian spelling (verb)
decrease the pressure of