There are 12 words that start with 'aller'.
| allergy | allergen |
| allergic | allergin |
| allergens | allergies |
| allergins | allergist |
| allergenic | allergists |
| allergenicity | allergenicities |
Note: These 12 words that start with 'aller' are found from the USA & Canada version of the tournament Scrabble word list.