There are 15 6-letter words that start with 'mut'.
| mutant | mutase | mutate | mutely | mutest | 
| mutine | muting | mutiny | mutism | mutons | 
| mutter | mutton | mutual | mutuel | mutule | 
Note: These 15 6-letter words that start with 'mut' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with muti, muta, mutu, mutt, mute, mutc, muto, muts.
4-letter words start with 'mut' (3)