There are 18 words that start with 'scum'.
| scum | scums | scummy |
| scumbag | scumble | scummed |
| scummer | scumbags | scumbled |
| scumbles | scumless | scumlike |
| scummers | scummier | scummily |
| scumming | scumbling | scummiest |
Note: These 18 words that start with 'scum' are found from the USA & Canada version of the tournament Scrabble word list.