| adusto | scorched |
| Advaita Vedanta | Advaita Vedanta |
| Advaita Vedānta | Advaita Vedanta |
| Advance Australia Fair | Advance Australia Fair |
| Advanced Access Content System | Advanced Access Content System |
| Advanced Amphibious Assault Vehicle | Expeditionary Fighting Vehicle |
| Advanced Audio Coding | Advanced Audio Coding |
| Advanced Configuration and Power Interface | Advanced Configuration and Power Interface |
| Advanced Linux Sound Architecture | Advanced Linux Sound Architecture |
| Advanced Micro Devices | Advanced Micro Devices |
| Advanced Packaging Tool | Advanced Packaging Tool |
| Advanced Passenger Train | Advanced Passenger Train |
| Advanced Spaceborne Thermal Emission and Reflection Radiometer | Advanced Spaceborne Thermal Emission and Reflection Radiometer |
| Advanced Stream Redirector | Advanced Stream Redirector |
| Advanced Systems Format | Advanced Systems Format |
| Advanced Technology Attachment | AT Attachment |
| Advergame | Advergaming |
| Adynaton | Adynaton |
| Adûnaico | Adûnaic |
| Adıyaman | Adıyaman Province |
| AE | AE |
| AEC | AEC Armoured Car |
| Aechmea | Aechmea |
| Aechmophorus occidentalis | Western Grebe |
| AED | AED |
| Aede | Aoede |
| Aedermannsdorf | Aedermannsdorf |
| Aedes aegypti | Aedes aegypti |
| Aedes albopictus | Asian tiger mosquito |
| Aedh di Scozia | Áed of Scotland |
| Aedo | Aoidos |
| Aedone | Aedon |
| Aefligen | Aefligen |
| Aegagropila linnaei | Marimo |
| Aegerten | Aegerten |
| Aegidienberg | Aix-la-Chapelle |
| Aegithina | Iora |
| Aegithina nigrolutea | White-tailed Iora |
| Aegithina tiphia | Common Iora |
| Aegukga | Aegukga |
| Aegviidu | Aegviidu |
| Aegypiinae | Old World vulture |
| Aegyptosaurus baharijensis | Aegyptosaurus |
| Aegyptus | Aegyptus |
| AEK | AEK |
| AEK Atene | AEK Athens FC |
| AEL | AEL |
| Aelfwine di Deira | Ælfwine of Deira |
| Aelita | Aelita |
| Aella | Aello |
| Aella di Deira | Ælla of Deira |
| Aelle del Sussex | Ælle of Sussex |
| Aeolosaurus rionegrinus | Aeolosaurus |
| Aepisaurus elephantinus | Aepisaurus |
| Aepycamelus | Aepycamelus |
| Aepyornis maximus | Aepyornis |
| Aer Lingus | Aer Lingus |
| Aera Cura | Erecura |
| aerare | ventilate |
| aerato | aerated |
