There are 20 5-letter words that start with 'au'.
| autos | auxin | audad | audio | audit |
| auger | aught | augur | aulic | aunts |
| aunty | aurae | aural | aurar | auras |
| aurei | aures | auric | auris | aurum |
Note: These 20 5-letter words that start with 'au' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with aut, aud, aur, aus, aug, aub, aux, aun, auc, auk, aul.
3-letter words start with 'au' (1)