Westinghouse is a proper noun, referring to an American corporation founded in the late 19th century. In terms of synonyms, depending on the context, the term could be a reference to electrical appliances, such as refrigerators, microwaves, and washing machines. In this case, "Whirlpool" or "Maytag" could be considered synonyms. In other cases, the reference may be to electricity generation, transmission, or distribution products and services. With this in mind, other companies that could be viewed as potential synonyms include "General Electric", "Siemens", and "ABB", among others. Ultimately, the choice of synonym will depend on the exact meaning implied by the context.