There are 10 words that start with 'photod'.
| photodiode | photodiodes |
| photodynamic | photodetector |
| photodetectors | photoduplicate |
| photodegradable | photodissociate |
| photoduplicated | photoduplicates |
Note: These 10 words that start with 'photod' are found from the USA & Canada version of the tournament Scrabble word list.