There are 21 words that start with 'burr'.
| burr | burro | burrs | 
| burry | burred | burrer | 
| burros | burrow | burrers | 
| burrier | burring | burrito | 
| burrows | burriest | burritos | 
| burrowed | burrower | burrowers | 
| burrowing | burrstone | burrstones | 
Note: These 21 words that start with 'burr' are found from the USA & Canada version of the tournament Scrabble word list.