There are 6 11-letter words that start with 'jac'.
| jackhammers | jackknifing | jacklighted | 
| jackrabbits | jackrolling | jactitation | 
Note: These 6 11-letter words that start with 'jac' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with jack, jaca, jaco, jacu, jaci, jacq, jact.
4-letter words start with 'jac' (1)