CPL, or cost per lead, is an essential term in digital marketing. It signifies the cost of generating each lead for a company. However, there are many synonyms for CPL which can be used in marketing or advertising. One of the popular terms is "lead generation cost," which refers to the amount of money that a business spends on generating leads. Another synonym is "customer acquisition cost," which signifies the cost of acquiring new customers. Lastly, "lead acquisition cost" is also used, which is the same as CPL, and it refers to the cost of acquiring each new lead for a company's sales funnel. These synonyms can be used interchangeably, depending on the context.