There are 15 words that start with 'hyst'.
| hysteria | hysteric |
| hysterias | hysterics |
| hysteroid | hystereses |
| hysteresis | hysteretic |
| hysterical | hysterotomy |
| hysterectomy | hysterically |
| hysterotomies | hysterectomies |
| hysterectomized | |
Note: These 15 words that start with 'hyst' are found from the USA & Canada version of the tournament Scrabble word list.