catheterisation vs Australian spelling

catheterisation and Australian spelling both are nouns.

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

catheterisation (noun)	Australian spelling (noun)
the operation of introducing a catheter into the body	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')