Australian spelling vs skin colour

Australian spelling and skin colour both are nouns.

Word	Noun	Adjective	Verb	Adverb
Australian spelling	Yes	No	No	No
skin colour	Yes	No	No	No

Australian spelling (noun)	skin colour (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the coloring of a person's face