Flea market and Shopping center

Flea market noun - An open-air street market for inexpensive or secondhand articles.

Shopping center and flea market are semantically related In some cases you can use "Shopping center" instead a noun phrase "Flea market".

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.

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