Bargaining with someone is a common practice when it comes to making a purchase. HAGGLE, which has 6 letters, and NEGOTIATE, which has 9 letters, are two words that can be used to describe the process of bargaining with someone. HAGGLE is often used to refer to a more informal type of negotiation, while NEGOTIATE is used to refer to a more formal type of negotiation. Both terms involve attempting to reach an agreement on a price or other terms of a transaction.