There are 11 words that start with 'strato'.
| stratous | stratocracy | 
| stratocumuli | stratosphere | 
| stratocracies | stratocumulus | 
| stratospheres | stratospheric | 
| stratovolcano | stratovolcanos | 
| stratovolcanoes | |
Note: These 11 words that start with 'strato' are found from the USA & Canada version of the tournament Scrabble word list.