There are 16 words that start with 'swat'.
| swat | swath | swats | swatch | 
| swathe | swaths | swathed | swather | 
| swathes | swatted | swatter | swatches | 
| swathers | swathing | swatters | swatting | 
Note: These 16 words that start with 'swat' are found from the USA & Canada version of the tournament Scrabble word list.