Australian spelling vs eye colour

Australian spelling and eye colour both are nouns.

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

Australian spelling (noun)	eye colour (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	The pigmentation of the eye's iris.