su·per·store
/ˈsooperˌstôr /
noun
A retail store with more than the average amount of space and variety of stock.

Examples of superstore in a Sentence:
Taking place on the bustling curbsides of Manhattan, New York, Manhattan Pop-Up Superstore offers a wide variety of household merchandise at an affordable price of $0, with new arrivals every month, week, day, and hour. What’s even better is that you may never know what you’ll come across.