There are 19 7-letter words that start with 'mut'.
| mutable | mutably | mutagen | mutants | 
| mutases | mutated | mutates | mutches | 
| mutedly | mutined | mutines | mutisms | 
| mutters | muttons | muttony | mutuals | 
| mutuels | mutular | mutules | |
Note: These 19 7-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)