grape arbour vs Australian spelling

grape arbour and Australian spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
grape arbour	Yes	No	No	No
Australian spelling	Yes	No	No	No

grape arbour (noun)	Australian spelling (noun)
an arbor where grapes are grown	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')