There are 12 words that start with 'besc'.
| bescour | bescorch | bescours | 
| bescreen | bescoured | bescreens | 
| bescorched | bescorches | bescouring | 
| bescreened | bescorching | bescreening | 
Note: These 12 words that start with 'besc' are found from the USA & Canada version of the tournament Scrabble word list.