There are 9 13-letter words that start with 'bou'.
| bougainvillea | bouillabaisse |
| boulevardiers | boundednesses |
| boundlessness | bounteousness |
| bountifulness | bourguignonne |
| boustrophedon | |
Note: These 9 13-letter words that start with 'bou' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with boun, bour, boul, boug, bous, bout, bouc, boud, bouf, boui, bouv, bouz, boub, bouq.
4-letter words start with 'bou' (1)