There are 13 words that start with 'cryos'.
| cryostat | cryoscope | 
| cryoscopy | cryostats | 
| cryoscopes | cryoscopic | 
| cryostatic | cryoscopies | 
| cryosurgeon | cryosurgery | 
| cryosurgeons | cryosurgical | 
| cryosurgeries | |
Note: These 13 words that start with 'cryos' are found from the USA & Canada version of the tournament Scrabble word list.