There are 33 8-letter words that start with 'mat'.
Note: These 33 8-letter words that start with 'mat' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with mate, matr, matc, matt, matu, math, mati, matz, mats, mata, matl.
4-letter words start with 'mat' (4)