minimisation vs Australian spelling

minimisation and Australian spelling both are nouns.

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

minimisation (noun)	Australian spelling (noun)
the act of reducing something to the least possible amount or degree or position	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')