There are 2 13-letter words that start with 'blu'.
| bluestockings | blunderbusses |
Note: These 2 13-letter words that start with 'blu' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with blue, blun, blur, blus, blub, bluf, blud, blui, blum, bluc.
4-letter words start with 'blu' (3)