There are 14 words that start with 'arma'.
| armada | armadas |
| armagnac | armament |
| armature | armadillo |
| armagnacs | armaments |
| armatured | armatures |
| armadillos | armaturing |
| armamentaria | armamentarium |
Note: These 14 words that start with 'arma' are found from the USA & Canada version of the tournament Scrabble word list.