There are 15 words that start with 'oversi'.
| oversick | overside |
| oversize | oversides |
| oversight | oversized |
| oversizes | oversights |
| oversimple | oversimply |
| oversimplify | oversimplified |
| oversimplifies | oversimplistic |
| oversimplifying | |
Note: These 15 words that start with 'oversi' are found from the USA & Canada version of the tournament Scrabble word list.