There are 11 words that start with 'swal'.
| swale | swales | swallow | 
| swallows | swallowed | swallower | 
| swallowers | swallowing | swallowable | 
| swallowtail | swallowtails | |
Note: These 11 words that start with 'swal' are found from the USA & Canada version of the tournament Scrabble word list.