There are 10 words that start with 'imperf'.
| imperfect | imperfects |
| imperfectly | imperforate |
| imperfection | imperfective |
| imperfections | imperfectives |
| imperfectness | imperfectnesses |
Note: These 10 words that start with 'imperf' are found from the USA & Canada version of the tournament Scrabble word list.