The Eskimo’s have many different words for ice, since these differences are significant for them. Similarly, in customer service we make a distinction among end-users who (might) pay the customers who pay the client who pays the outsourcer, who responds in the name of the client.

Analogously, in Sales we make a distinction among (‘real’) Sales Managers who hunt for new Clients, Account Managers who hunt for new projects with existing Clients, Implementation Managers who project manage the implementation of a new product or service, and Operational Managers who then realize the promises made by the former three.

Or: An Account is something different from a Project!