Appraisers are professionals who assess the value of items or services. Raters, with six letters, are appraisers who evaluate the quality of something, while valuators, with nine letters, are appraisers who determine the monetary value of something. Appraisers are often used in the real estate industry to assess the value of a property, and they can also be used in the insurance industry to assess the value of an item that has been damaged or lost.