| aiatolá | ayatollah |
| Aibo | AIBO |
| AIC | Anime International Company |
| Aicha | Aisha |
| Aicha vorm Wald | Aicha vorm Wald |
| Aichach | Aichach |
| Aichach-Friedberg | Aichach-Friedberg |
| Aichelberg | Aichelberg |
| Aichhalden | Aichhalden |
| Aichi | Aichi |
| Aichstetten | Aichstetten |
| Aichtal | Aichtal |
| Aichwald | Aichwald |
| Aida | Aida |
| aide-de-acampamento | aide-de-camp |
| Aidi | Aidi |
| Aidlingen | Aidlingen |
| AIDS | AIDS |
| Aielo de Malferit | Aielo de Malferit |
| Aielo de Rugat | Aielo de Rugat |
| AIESEC | AIESEC |
| AIFF | Audio Interchange File Format |
| Aigars Kalvītis | Aigars Kalvītis |
| Aigle | Eagle |
| Aiglsbach | Aiglsbach |
| Aignerville | Aignerville |
| Aigues-Mortes | Aigues-Mortes |
| Aiguilhe | Aiguilhe |
| Aiguillon | Aiguillon |
| Aigurande | Aigurande |
| Aigües | Aigües |
| AIK Fotboll | AIK Fotboll |
| aikido | aikido |
| aikidoca | aikidoka |
| aikidô | aikido |
| Ailanthus altissima | Ailanthus altissima |
| ailanto | ailanthus |
| Aileen Wuornos | Aileen Wuornos |
| aileron | aileron |
| Aileu | Aileu |
| Aimable Pélissier | Aimable Pélissier |
| Aimará | Aymara |
| Aimarás | Aymara ethnic group |
| Aimee McPherson | Aimee Semple McPherson |
| Aimo Diana | Aimo Diana |
| Aimo Kaarlo Cajander | Aimo Cajander |
| Aimorés | Aimorés |
| Ain | Ain |
| Ain Defla | Aïn Defla Province |
| Ain Soph | Ein Sof |
| Ain Temouchent | Aïn Témouchent Province |
| Ainaro | Ainaro |
| Aincille | Aincille |
| ainda | yet |
| ainda assim | but |
| ainda bem | thank goodness |
| ainda não | not yettanding |
| ainda não acordado | not yet upding |
| ainda por cima | besides |
| ainda que | notwithstanding |
| ainda é cedo | the night is a pup (AUS) |
| aindai | yet |
| Ainharp | Ainharp |
| ainhum | ainhum |
| ainos | Ainu |
| Ainring | Ainring |
| Ainulindalë | Ainulindalë |
| Ainur | Ainu |
| ainus | Ainu |
| aioli | aioli |
| Aiolia de Leão | Leo Aiolia |
| Aiolos de Sagitário | Sagittarius Aiolos |
| aipim | cassava |
| aipo | celery |
| aipo branco | blanched celery |
| aipo-rábano | celeriac |
| aipoxi | celeryle |
| Air Algérie | Air Algérie |
| Air Astana | Air Astana |
| Air Blue | Airblue |
| Air Canada | Air Canada |
| Air Canada Centre | Air Canada Centre |
| Air China | Air China Cargo |
| Air Comet | Air Comet |
| Air Deccan | Simplifly Deccan |
| Air Force One | Air Force One |
| Air France | Air France |
| Air France-KLM | Air France-KLM |
| air guitar | air guitar |
| Air India | Air India |
| Air Madrid | Air Madrid |
| Air Mauritius | Air Mauritius |
| Air New Zealand | Air New Zealand |
| Air New Zealand Cup | Air New Zealand Cup |
| Air Rarotonga | Air Rarotonga |
| Air Sahara | Jet Lite |
| Air Senegal International | Air Sénégal International |
| Air São Tomé e Príncipe | Air São Tomé and Príncipe |
| Air Tahiti Nui | Estonian Air |
| Air Transat | Air Transat |
| air-bus | airbus |
