There are 4 14-letter words that start with 'stu'.
| stubbornnesses | studiousnesses |
| stultification | stupendousness |
Note: These 4 14-letter words that start with 'stu' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with stud, stup, stum, stun, stub, stuf, stur, stuc, stul, stut, stui.
4-letter words start with 'stu' (4)