There are 12 words that start with 'backp'.
| backpack | backpacks |
| backpedal | backpacked |
| backpacker | backpedals |
| backpackers | backpacking |
| backpedaled | backpedaling |
| backpedalled | backpedalling |
Note: These 12 words that start with 'backp' are found from the USA & Canada version of the tournament Scrabble word list.