There are 14 words that start with 'retrof'.
| retrofit | retrofire |
| retrofits | retroflex |
| retrofired | retrofires |
| retrofiring | retrofitted |
| retroflexes | retrofitting |
| retroflexion | retroflection |
| retroflexions | retroflections |
Note: These 14 words that start with 'retrof' are found from the USA & Canada version of the tournament Scrabble word list.