There are 14 7-letter words that start with 'prot'.
| protean | proteas | protect | protege |
| proteid | protein | protend | protest |
| proteus | protist | protium | protons |
| protyle | protyls | ||
Note: These 14 7-letter words that start with 'prot' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with proto, prote, protr, proth, prota, proti, protu, proty.
6-letter words start with 'prot' (4)