There are 10 words that start with 'tetrac'.
| tetracid | tetracids |
| tetracaine | tetrachord |
| tetracaines | tetrachords |
| tetracycline | tetrachloride |
| tetracyclines | tetrachlorides |
Note: These 10 words that start with 'tetrac' are found from the USA & Canada version of the tournament Scrabble word list.