There are 12 words that start with 'bless'.
| bless | blessed | 
| blesser | blesses | 
| blessers | blessing | 
| blesseder | blessedly | 
| blessings | blessedest | 
| blessedness | blessednesses | 
Note: These 12 words that start with 'bless' are found from the USA & Canada version of the tournament Scrabble word list.