There are 16 words that start with 'sonn'.
| sonny | sonnet |
| sonnets | sonnies |
| sonneted | sonneteer |
| sonneting | sonnetize |
| sonnetted | sonneteers |
| sonnetized | sonnetizes |
| sonnetting | sonnetizing |
| sonneteering | sonneteerings |
Note: These 16 words that start with 'sonn' are found from the USA & Canada version of the tournament Scrabble word list.