oil colour vs Australian spelling

oil colour and Australian spelling both are nouns.

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

oil colour (noun)	Australian spelling (noun)
oil paint containing pigment that is used by an artist	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')