There are 12 words that start with 'prefr'.
prefrank | prefroze | prefranks |
prefreeze | prefrozen | prefranked |
prefreezes | prefrontal | prefranking |
prefreezing | prefreshman | prefrontals |
Note: These 12 words that start with 'prefr' are found from the USA & Canada version of the tournament Scrabble word list.