Australian spelling vs maximisation

Australian spelling and maximisation both are nouns.

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

Australian spelling (noun)	maximisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the act of raising to the highest possible point or condition or position