There are 24 words that start with 'matt'.
| matt | matte | matts | 
| matted | matter | mattes | 
| mattin | matters | mattery | 
| matting | mattins | mattock | 
| mattoid | mattedly | mattered | 
| mattings | mattocks | mattoids | 
| mattrass | mattress | matterful | 
| mattering | mattrasses | mattresses | 
Note: These 24 words that start with 'matt' are found from the USA & Canada version of the tournament Scrabble word list.