Which term describes a large self-service retail store that sells food and household goods?

The term that best describes a large self-service retail store selling food and household goods is a supermarket. Supermarkets typically offer a wide variety of products, including fresh produce, meats, dairy, canned goods, and various household items, all under one roof. They are designed to provide a one-stop shopping experience for consumers, where customers can select their items from shelves and pay at a checkout counter.

While a warehouse may also sell similar goods, it usually refers to a bulk selling model or a storage facility rather than a self-service retail environment. Convenience stores, on the other hand, are smaller and focus on providing quick access to a limited range of everyday items, typically at higher prices. Specialty shops concentrate on niche products or specific categories, often providing specialized knowledge or products that mass retailers do not carry. Thus, the definition and scale of a supermarket aligns perfectly with the characteristics outlined in the question.