There are 11 words that start with 'peps'.
| peps | pepsin | pepsine | 
| pepsins | pepsines | pepsinate | 
| pepsinated | pepsinates | pepsinogen | 
| pepsinating | pepsinogens | |
Note: These 11 words that start with 'peps' are found from the USA & Canada version of the tournament Scrabble word list.