2-letter words that start with B are 2 and 3-letter words that start with B are 4. 4-letter words that start with B are 13 and 5-letter words that start with B are 21. 6-letter words that start with B are 13 and 7-letter words that start with B are 10. 8-letter words that start with B are 5 and 9-letter words that start with B are 6. 10-letter words that start with B are 2 and 12-letter words that start with B is 1. Total start with B are 77.