There are 10 words that start with 'silli'.
| sillier | sillies | sillily |
| sillibub | silliest | sillibubs |
| silliness | sillimanite | sillinesses |
| sillimanites | ||
Note: These 10 words that start with 'silli' are found from the USA & Canada version of the tournament Scrabble word list.