Australian spelling vs Mycenaean civilisation

Australian spelling and Mycenaean civilisation both are nouns.

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

Australian spelling (noun)	Mycenaean civilisation (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	the late bronze-age culture of Mycenae that flourished 1400-1100 BC