There are 14 words that start with 'tect'.
| tecta | tectal | tectum |
| tectite | tectrix | tectums |
| tectites | tectonic | tectonics |
| tectonism | tectorial | tectrices |
| tectonisms | tectonically | |
Note: These 14 words that start with 'tect' are found from the USA & Canada version of the tournament Scrabble word list.