Australian spelling vs cubic millimetre

Australian spelling and cubic millimetre both are nouns.

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

Australian spelling (noun)	cubic millimetre (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	a metric measure of volume or capacity equal to a cube 1 millimeter on each edge