There are 12 words that start with 'boon'.
| boon | boons | boonies | 
| boondock | boonless | boondocks | 
| boondoggle | boondoggled | boondoggler | 
| boondoggles | boondogglers | boondoggling | 
Note: These 12 words that start with 'boon' are found from the USA & Canada version of the tournament Scrabble word list.