nationalisation vs Australian spelling

nationalisation and Australian spelling both are nouns.

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

nationalisation (noun)	Australian spelling (noun)
changing something from private to state ownership or control	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')
the action of rendering national in character
the action of forming or becoming a nation