There are 15 words that start with 'pht'.
| pht | phthalic |
| phthalin | phthises |
| phthisic | phthisis |
| phthalate | phthalein |
| phthalins | phthisics |
| phthalates | phthaleins |
| phthisical | phthalocyanine |
| phthalocyanines | |
Note: These 15 words that start with 'pht' are found from the USA & Canada version of the tournament Scrabble word list.