There are 15 words that start with 'lass'.
| lass | lassi | lasso |
| lasses | lassie | lassis |
| lassos | lassies | lassoed |
| lassoer | lassoes | lassoers |
| lassoing | lassitude | lassitudes |
Note: These 15 words that start with 'lass' are found from the USA & Canada version of the tournament Scrabble word list.