Aust - bark
- Austen
- austenite
- austenitic
- austere
- austerely
- austereness
- austerity
- Austerlitz
- Austin
- Austinite
- Austr-
- Austral
- austral
- Austral Islands
- Australasia
- Australasian
- Australia
- Australia Day
- Australian
- Australian Alps
- Australian ballot
- Australian Capital Territory
- Australian cattle dog
- Australian pine
- Australian Rules football
- Australian shepherd
- Australian terrier
- Australianism
- Australoid
- australopithecine
- Austrasia
- Austrasian
- Austria
- Austria-Hungary
- Austrian
- Austrian pine
- Austro-
- Austro-Hungarian
- Austroasiatic
- Austronesia
