There are 16 words that start with 'prefer'.
| prefer | prefers |
| preferred | preferrer |
| preferable | preferably |
| preference | preferment |
| preferrers | preferring |
| preferences | preferments |
| preferential | preferability |
| preferentially | preferabilities |
Note: These 16 words that start with 'prefer' are found from the USA & Canada version of the tournament Scrabble word list.