There are 13 words that start with 'upsw'.
| upsweep | upswell | upswept |
| upswing | upswung | upsweeps |
| upswells | upswings | upswelled |
| upswollen | upsweeping | upswelling |
| upswinging | ||
Note: These 13 words that start with 'upsw' are found from the USA & Canada version of the tournament Scrabble word list.