Agora and Shopping center

Agora noun - The marketplace in ancient Greece.

Shopping center and agora are semantically related In some cases you can use "Shopping center" instead a noun "Agora".

Shopping center noun - Mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace.

Agora and shopping center are semantically related in collection of stores in one place topic. You can use "Agora" instead a noun phrase "Shopping center".