There are 15 words that start with 'backsl'.
| backslap | backslid | backslaps |
| backslash | backslide | backslider |
| backslides | backslapped | backslapper |
| backslashes | backslidden | backsliders |
| backsliding | backslappers | backslapping |
Note: These 15 words that start with 'backsl' are found from the USA & Canada version of the tournament Scrabble word list.