Home Misspellings How to spell bianual? Bianual or biannual? Which one is correct? by hersey November 30, 2018 Reading Time: 0min, 7sc + - 0 Bianual or biannual Which one is correct? You can find the answer below. Incorrect Bianual Correct Biannual You can find more information about Biannual word here. Rate this post Correct spelling of bianualHow do you spell bianual