There are 105 11-letter words that start with 'bi'.
Note: These 105 11-letter words that start with 'bi' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with bio, bil, bir, bit, bib, big, bin, bis, bic, bip, bim, bif, bid, bia, biz, biv, bie, bik, bij, biu, biq, biw, bih, biy.
3-letter words start with 'bi' (8)