Australian spelling vs oil colour

Australian spelling and oil colour both are nouns.

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

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