There are 14 words that start with 'ao'.
| aorta | aorist |
| aortae | aortal |
| aortas | aortic |
| aoudad | aorists |
| aoudads | aoristic |
| aortography | aoristically |
| aortographic | aortographies |
Note: These 14 words that start with 'ao' are found from the USA & Canada version of the tournament Scrabble word list.