Lead items refer to the most important and significant products or services that a company offers. They are the ones that generate the most revenue and lead to the success of the business. However, there are several synonyms for lead items that mean the same thing. These include core products, flagship items, top sellers, bestsellers, primary offerings, mainstay products, and primary sources of revenue. All of these terms refer to the critical products or services that are essential to the company's success. Understanding their importance and promoting them can help businesses achieve success and increase their profits.