There are 19 words that start with 'aa'.
| aa | aah | aal |
| aas | aahs | aals |
| aahed | aalii | aargh |
| aahing | aaliis | aarrgh |
| aarrghh | aardvark | aardwolf |
| aasvogel | aardvarks | aasvogels |
| aardwolves | ||
Note: These 19 words that start with 'aa' are found from the USA & Canada version of the tournament Scrabble word list.