The words “biannual” and “biennial” are two such terms that are frequently used interchangeably, but are actually quite different. Let’s take a closer look at why people keep getting confused between these two. Now that you have mastered the meanings of biannual and biennial, discover the difference between biannual and semiannual. Then review other words… Poursuivre la lecture Biannual vs Biennial: Comparing the Frequency and Meanings