There are 16 words that start with 'reflex'.
| reflex | reflexed |
| reflexes | reflexly |
| reflexing | reflexion |
| reflexive | reflexions |
| reflexives | reflexively |
| reflexivity | reflexology |
| reflexiveness | reflexivities |
| reflexologies | reflexivenesses |
Note: These 16 words that start with 'reflex' are found from the USA & Canada version of the tournament Scrabble word list.