There are 11 words that start with 'strati'.
| strati | stratify | 
| stratified | stratifies | 
| stratiform | stratifying | 
| stratigraphy | stratigraphic | 
| stratification | stratigraphies | 
| stratifications | |
Note: These 11 words that start with 'strati' are found from the USA & Canada version of the tournament Scrabble word list.