| Acheville | Acheville |
| Achgabat | Ashgabat |
| Achicourt | Achicourt |
| Achiet-le-Grand | Achiet-le-Grand |
| Achiet-le-Petit | Achiet-le-Petit |
| Achille | Achilles |
| Achille Alferaki | Achilles Alferaki |
| Achille Castiglioni | Achille Castiglioni |
| Achille Emperaire | Achille Emperaire |
| Achille Lauro | Achille Lauro |
| Achille Liénart | Achille Liénart |
| Achille Talon | Walter Melon |
| Achille van Acker | Achille Van Acker |
| Achille Webo | Pierre Webó |
| Achilleion | Achilleion |
| Achilles Tatius | Achilles Tatius |
| Achillobator | Achillobator |
| achillée | yarrow |
| Achillée millefeuille | Achillea millefolium |
| Achillée sternutatoire | Achillea ptarmica |
| Achim | Achim |
| Achim von Arnim | Ludwig Achim von Arnim |
| Achinoam Nini | Achinoam Nini |
| Achiridae | American sole |
| Achkhabad | Ashgabat |
| Achmiany | Ashmyany |
| Acholique | Acholic |
| Achondrite | Achondrites |
| achondroplasie | achondroplasia |
| Achoura | Day of Ashura |
| Achrafieh | Achrafieh |
| Achromatine | Achromatin |
| achromatique | achromatic |
| achromatisme | achromatism |
| Achrome | White |
| Achromique | Achromic |
| Achtarak | Ashtarak |
| Achzarit | IDF Achzarit |
| Achères-la-Forêt | Achères-la-Forêt |
| achèvement | accomplishment |
| Achéens | Achaeans |
| Achéloos | Achelous |
| Achéménides | Achaemenid Empire |
| Achéménès | Achaemenes |
| Achéron | Acheron |
| Achôris | Hakor |
| Aciclovir | Aciclovir |
| Aciculé | Aciculate |
| Acid Drinkers | Acid Drinkers |
| Acid house | Acid house |
| Acid Pro Loop | ACID Pro |
| Acid techno | Acid techno |
| Acid test | The Electric Kool-Aid Acid Test |
| Acid trance | Acid trance |
| acide | acerbic |
| Acide abscissique | Abscisin |
| acide acétique | acetic acid |
| acide acétylacétique | acetoacetic acid |
| acide acétylsalicylique | acetylsalicylic acid |
| Acide alpha hydroxylé | Alpha hydroxy acid |
| acide aminé | amino acid |
| Acide anhydride | Carbonic acid |
| Acide arachidonique | Arachidonic acid |
| acide ascorbique | ascorbic acid |
