civilisation vs Australian spelling

civilisation and Australian spelling both are nouns.

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

civilisation (noun)	Australian spelling (noun)
the quality of excellence in thought and manners and taste	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')
a society in an advanced state of social development (e.g., with complex legal and political and religious organizations)
a particular society at a particular time and place
the social process whereby societies achieve an advanced stage of development and organization