The term "yagi" typically refers to a specific type of directional antenna commonly used in radio communication. However, there are several synonyms for this word that can be used in various contexts. Some related terms include the "beam antenna," "directional antenna," or even simply the "yagi-uda antenna." These synonyms might be used in scientific or technical writing when referring to different aspects of antenna design or functionality. However, in general conversation, it's likely that most people would simply refer to any directional antenna as a yagi, regardless of its specific design or technical specifications.