Semiannually is a word that refers to an event or occurrence that takes place twice a year. However, there are other words that can be used to express the same frequency of an event. These include bi-annually, which refers to something that occurs every two years, as well as bi-yearly, semiyearly, and half-yearly. Additionally, the terms bi-annual and twice-yearly are also frequently used. While these words may not be as commonly used as semiannually, they serve the same purpose by allowing individuals to accurately describe how often an event will occur. Ultimately, the choice of which synonym to use may vary depending on personal preference and the specific context in which the word is being used.