There are 10 words that start with 'antith'.
| antitheft | antitheses |
| antithesis | antithetic |
| antithyroid | antithetical |
| antithrombin | antithrombins |
| antithetically | antitheoretical |
Note: These 10 words that start with 'antith' are found from the USA & Canada version of the tournament Scrabble word list.