There are several synonyms for the term "household name," which means a name or entity that is widely known and recognized by most people. Some of the most common synonyms for this term include "famous," "renowned," "celebrated," "legendary," "notorious," "prominent," "well-known," "popular," and "iconic." Each of these words connotes that the person or thing they describe is recognized by a large number of people and has become a part of popular culture. For instance, a celebrity like Oprah Winfrey, a business like Coca-Cola, or a landmark like the Eiffel Tower are all household names that are instantly recognizable to most people around the world.