There are 11 words that start with 'thalas'.
| thalassic | thalassemia |
| thalassemic | thalassaemia |
| thalassemias | thalassemics |
| thalassocrat | thalassaemias |
| thalassocracy | thalassocrats |
| thalassocracies | |
Note: These 11 words that start with 'thalas' are found from the USA & Canada version of the tournament Scrabble word list.