There are 18 words that start with 'archai'.
| archaic | archaise | archaism |
| archaist | archaize | archaical |
| archaised | archaises | archaisms |
| archaists | archaized | archaizer |
| archaizes | archaising | archaistic |
| archaizers | archaizing | archaically |
Note: These 18 words that start with 'archai' are found from the USA & Canada version of the tournament Scrabble word list.