Australian spelling vs Aegean civilisation

Australian spelling and Aegean civilisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
Australian spelling	Yes	No	No	No
Aegean civilisation	Yes	No	No	No

Australian spelling (noun)	Aegean civilisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the prehistoric civilization on the islands in the Aegean sea and the surrounding countries