Australian spelling vs cubic kilometre

Australian spelling and cubic kilometre both are nouns.

Word	Noun	Adjective	Verb	Adverb
Australian spelling	Yes	No	No	No
cubic kilometre	Yes	No	No	No

Australian spelling (noun)	cubic kilometre (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	a unit of capacity equal to the volume of a cube one kilometer on each edge