Western culture vs civilisation

Western culture and civilisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
Western culture	Yes	No	No	No
civilisation	Yes	No	No	No

As nouns, civilisation is a hypernym of Western culture; that is, civilisation is a word with a broader meaning than Western culture:

Other hypernyms of Western culture include civilization, culture.

Western culture (noun)	civilisation (noun)
the modern culture of western Europe and North America	the quality of excellence in thought and manners and taste
	a society in an advanced state of social development (e.g., with complex legal and political and religious organizations)
	a particular society at a particular time and place
	the social process whereby societies achieve an advanced stage of development and organization