Economizers are devices that help reduce energy consumption. There are various synonyms for this word. One of the synonyms is energy-saving devices. These are appliances or equipment designed to save energy or reduce energy usage. Another synonym is energy-efficient equipment, which refers to devices that consume less energy to perform the same task. Energy-conservation equipment is another term used to refer to economizers, as it refers to devices or methods used to reduce energy consumption. Finally, fuel-saving equipment is another synonym for economizers, as it refers to appliances or tools designed to reduce fuel consumption. Regardless of the term used, economizers play a vital role in energy conservation and environmental protection efforts.