There are 19 words that start with 'deep'.
| deep | deeps | deepen |
| deeper | deeply | deepens |
| deepest | deepened | deepener |
| deepness | deepeners | deepening |
| deepfroze | deepwater | deepfreeze |
| deepfrozen | deepnesses | deepfreezes |
| deepfreezing | ||
Note: These 19 words that start with 'deep' are found from the USA & Canada version of the tournament Scrabble word list.