Aegean civilization vs Aegean civilisation

Aegean civilization and Aegean civilisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
Aegean civilization	Yes	No	No	No
Aegean civilisation	Yes	No	No	No

As nouns, Aegean civilization and Aegean civilisation are synonyms defined as:

Aegean civilization and Aegean civilisation: the prehistoric civilization on the islands in the Aegean sea and the surrounding countries

Other synonyms of Aegean civilization include Aegean culture.

Aegean civilization (noun)	Aegean civilisation (noun)
the prehistoric civilization on the islands in the Aegean sea and the surrounding countries	the prehistoric civilization on the islands in the Aegean sea and the surrounding countries