desalinisation vs Australian spelling

desalinisation and Australian spelling both are nouns.

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

desalinisation (noun)	Australian spelling (noun)
the removal of salt (especially from sea water)	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')