There are 14 words that start with 'sheet'.
| sheet | sheets | sheeted | 
| sheeter | sheeters | sheetfed | 
| sheeting | sheetings | sheetless | 
| sheetlike | sheetrock | sheetrocks | 
| sheetrocked | sheetrocking | |
Note: These 14 words that start with 'sheet' are found from the USA & Canada version of the tournament Scrabble word list.