There are 20 words that start with 'tetan'.
| tetany | tetanal |
| tetanic | tetanus |
| tetanics | tetanies |
| tetanise | tetanize |
| tetanoid | tetanical |
| tetanised | tetanises |
| tetanized | tetanizes |
| tetanuses | tetanising |
| tetanizing | tetanically |
| tetanization | tetanizations |
Note: These 20 words that start with 'tetan' are found from the USA & Canada version of the tournament Scrabble word list.