There are 16 words that start with 'scall'.
| scall | scalls | scallop | 
| scallion | scallops | scallawag | 
| scallions | scalloped | scalloper | 
| scallywag | scallawags | scallopers | 
| scalloping | scallopini | scallywags | 
| scallopinis | ||
Note: These 16 words that start with 'scall' are found from the USA & Canada version of the tournament Scrabble word list.