There are 18 words that start with 'backw'.
| backward | backwash |
| backwood | backwrap |
| backwards | backwater |
| backwoods | backwraps |
| backwardly | backwashed |
| backwashes | backwaters |
| backwoodsy | backwashing |
| backwardness | backwoodsman |
| backwoodsmen | backwardnesses |
Note: These 18 words that start with 'backw' are found from the USA & Canada version of the tournament Scrabble word list.