consumer is used in economics, usually in relation to massively produced goods : electronics consumers customer and client are mutually interchangeable , although some professions choose one or the other : a store has customers, whereas a lawyer has clients. guest is mostly used in the hospitality industry: This hotel can accommodate thousands of guests

"Consumer" is the opposite of "producer." It's a somewhat cold, semi-technical word for the people who buy products and "consume" them. Despite the similarly of the words, "customer" and "consumer" are not related. A customer is something who buys things at a store. A "customer" originally means someone who buys things regularly at a store--it is their "custom" to shop there, they "customarily" buy shop there--but nowadays it just means anyone who comes into a store to buy things. "Client" specifically means someone who is buying a service, often a professional service. Thus, the people who pay a lawyer for legal work are the lawyer's "clients." A financial advisor has "clients." A hairdresser or manicurist has "clients." "Guest" only has a business meaning with respect to the hospitality business (i.e. hotels). The people who stay at a hotel are "guests." Since a hotel is a business, its guests are also its "customers."

Hello Amber, These words are actually related to similar meaning. Consumer - a person who buys goods or services for their own use Customer - a person who buys goods or a service Client - a customer or someone who receives services Guest - a person who is staying with you, or a person you have invited to a social occasion, such as a party or a meal, a person who is staying in a hotel I hope you will understand now but if you have another questions you can contact me. I can help you in learning English. You can visit my profile and check my video :) Best regards, Sanya