There are 28 8-letter words that start with 'bon'.
Note: These 28 8-letter words that start with 'bon' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with bone, bond, bonn, boni, bong, bonk, bons, bona, bonh, bonz, bonb, bonf, bono, bont, bonu, bony.
4-letter words start with 'bon' (5)