There are 9 words that start with 'thig'.
| thigh | thighs |
| thighed | thighbone |
| thighbones | thigmotaxes |
| thigmotaxis | thigmotropism |
| thigmotropisms | |
Note: These 9 words that start with 'thig' are found from the USA & Canada version of the tournament Scrabble word list.