Helladic civilization vs Helladic culture

Helladic civilization and Helladic culture both are nouns.

Word	Noun	Adjective	Verb	Adverb
Helladic civilization	Yes	No	No	No
Helladic culture	Yes	No	No	No

As nouns, Helladic civilization and Helladic culture are synonyms defined as:

Helladic civilization and Helladic culture: the bronze-age culture of mainland Greece that flourished 2500-1100 BC

Other synonyms of Helladic civilization include Helladic civilisation.

Helladic civilization (noun)	Helladic culture (noun)
the bronze-age culture of mainland Greece that flourished 2500-1100 BC	the bronze-age culture of mainland Greece that flourished 2500-1100 BC