British spelling vs Mycenaean civilisation

British spelling and Mycenaean civilisation both are nouns.

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

British spelling (noun)	Mycenaean civilisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	the late bronze-age culture of Mycenae that flourished 1400-1100 BC