| avvèrbio | adverb |
| avvòlgere | wrap up |
| Avène | Avesnes |
| Avéron-Bergelle | Avéron-Bergelle |
| AW | AW |
| Awa | Awa Province |
| AWACS | Airborne Early Warning |
| Awad Hamed al-Bandar | Awad Hamed al-Bandar |
| Awaji | Awaji Province |
| Awash | Awash River |
| Away from the Sun | Away from the Sun |
| AWD-Arena | AWD-Arena |
| Awda Abu Tayi | Auda ibu Tayi |
| Awk | AWK |
| AWStats | AWStats |
| Awá | Awá |
| Ax-les-Thermes | Ax-les-Thermes |
| AXA | AXA |
| Axarquía | Axarquía |
| Axayacatl | Axayacatl |
| Axe historique | Axe historique |
| Axel | Axel jump |
| Axel Hugo Theodor Theorell | Hugo Theorell |
| Axel Johann Einar Lönnberg | Einar Lönnberg |
| Axel Munthe | Axel Munthe |
| Axel Pehrsson | Axel Pehrsson-Bramstorp |
| Axien | Axien |
| Axis calamianensis | Calamian Deer |
| Axis kuhlii | Bawean deer |
| Axis porcinus | Hog deer |
| Axl Rose | Axl Rose |
| Axpo Super League | Swiss Super League |
| Axum | Axum |
| AYA | AYA |
| Aya Hisakawa | Aya Hisakawa |
| Ayaan Hirsi Ali | Ayaan Hirsi Ali |
| Ayacucho | Ayacucho |
| Ayahuasca | Ayahuasca |
| Ayamonte | Ayamonte |
| Ayane | Ayane |
| Ayatollah | ayatollah |
| Ayauhteotl | Ayauhteotl |
| Aydın | Aydın Province |
| Ayen | Ayen |
| Ayent | Ayent |
| Ayerbe | Ayerbe |
| Ayguetinte | Ayguetinte |
| Ayherre | Ayherre |
| Aying | Aying |
| Ayles | Ayles Ice Shelf |
| Ayman al-Zawahiri | Ayman al-Zawahiri |
| Aymara | Aymara ethnic group |
| Ayn Rand | Ayn Rand |
| Ayo | Ayọ |
| AYR | Ayr |
| Ayrens | Ayrens |
| Ayrshire | Ayrshire |
| Ayrshire Orientale | East Ayrshire |
| Ayrshire Settentrionale | North Ayrshire |
| Ayrton Senna | Ayrton Senna |
| Aysen | Aysén Region |
| Ayssènes | Essen |
| Aystetten | Aystetten |
| Aythya | Aythya |
| Aythya ferina | Common Pochard |
| Aythya innotata | Madagascar Pochard |
| Aythya novaeseelandiae | New Zealand Scaup |
| Aytré | Aytré |
| Ayttm | Ayttm |
| Ayumi Hamasaki | Ayumi Hamasaki |
| Ayurveda | Ayurveda |
| Ayutthaya | Ayutthaya |
| Aywaille | Aywaille |
| Ayyavalismo | Ayyavazhi |
| Ayyubidi | Ayyubid dynasty |
| Ayzieu | Ayzieu |
| AZ | AZ |
| AZ Alkmaar | AZ |
| Azad Kashmir | Azad Kashmir |
| Azadiractina | Azadirachtin |
| azalea | azalea |
| Azalia | Intel High Definition Audio |
| Azarbaijan occidentale | West Azarbaijan Province |
| Azarbaijan orientale | East Azarbaijan Province |
| Azathoth | Azathoth |
| Azay-le-Ferron | Azay-le-Ferron |
| Azay-le-Rideau | Azay-le-Rideau |
| Azazel | Azazel |
| Azendohsaurus laaroussii | Azendohsaurus |
| azera | Azeri |
| Azerat | Azerat |
| Azerbaigian | Azerbaijan |
| azerbaigiano | Azeri |
| Azerbaijan | Azerbaijan |
| Azeri | Azerbaijani people |
| azero | Azeri |
| Azgayin Zhoghov | Azgayin Zhoghov |
| Azha | Eta Eridani |
| Azi Aslanov | Azi Aslanov |
| Azia Balba Cesonia | Atia Balba Caesonia |
| Azide | Azide |
