| Accelerated Graphics Port | Accelerated Graphics Port |
| Access Control List | Access Control List |
| Acclaim Entertainment | Acclaim Entertainment |
| Accolans | Accolans |
| Accolay | Accolay |
| Accons | Accons |
| Accous | Accous |
| Accursius | François Accurse |
| Ace of Base | Ace of Base |
| acefalia | acéphalie |
| Acena | Aix-la-Chapelle |
| acenaften | acénaphtène |
| Acer | Acer Incorporated |
| acerola | acérola |
| Acerra | Acerra |
| Acesulfam | Acésulfame potassium |
| Acetabularia | Acétabulaire |
| acetal | acétal |
| acetaldehyd | acétaldéhyde |
| Acetale | Acétal et cétal |
| acetamid | acétamide |
| acetanilid | acétanilide |
| Acetazolamid | Acétazolamide |
| acetofenon | acétophénone |
| aceton | acétone |
| Acetonitryl | Acétonitrile |
| acetylen | acétylène |
| Acetyloaceton | Acétylacétone |
| Acetylocholina | Acétylcholine |
| Acetylocholinesteraza | Cholinestérase |
| Acetylocysteina | Acétylcystéine |
| Acetylowanie | Acétylation |
| ACF Fiorentina | AC Fiorentina |
| Achab | Achab |
| Achacy | Acacius |
| Achain | Achain |
| Achaja | Achaïe |
| Achajos | Achaios II |
| Achajowie | Achéens |
| Achalazja przełyku | Achalasie |
| Acharawi | Akharavi |
| Acharnejczycy | Les Acharniens |
| Acharonim | Aharonim |
| Achaz | Achaz |
| Acheloos | Achéloos |
| Achelozaur | Achelousaure |
| Achemenes | Achéménès |
| Achemenidzi | Achéménides |
| Achen | Achen |
| Achenheim | Achenheim |
| Achern | Achern |
| Achernar | Alpha Eridani |
| Acheron | Achéron |
| Achery | Achery |
| Acheux-en-Amiénois | Acheux-en-Amiénois |
| Acheux-en-Vimeu | Acheux-en-Vimeu |
| Acheville | Acheville |
| Achey | Achey |
| Achicourt | Achicourt |
| Achiet-le-Grand | Achiet-le-Grand |
| Achiet-le-Petit | Achiet-le-Petit |
| Achille Webo | Achille Webo |
| Achilles | Achille |
| Achilles Tatios | Achilles Tatius |
| Achillobator | Achillobator |
| Achim | Achim |
| Achiote | Roucou |
| Achlorhydria | Achlorhydrie |
| Achmad Kadyrow | Akhmad Kadyrov |
| Achmim | Akhmîm |
| achondroplazja | achondroplasie |
| Achoris | Achôris |
| achromat | achromat |
| Achtersztag | Pataras |
| Achtuba | Akhtouba |
| Achun | Achun |
| Achy | Achy |
| Achères | Achères |
| Achères-la-Forêt | Achères-la-Forêt |
| ACID | Propriétés ACID |
| Acid Drinkers | Acid Drinkers |
| Acid house | Acid house |
| Acid rock | Acid rock |
| Acid techno | Acid techno |
| Acid-jazz | Acid jazz |
| Acigné | Acigné |
| Acireale | Acireale |
| Acis | Acis |
| Aclens | Aclens |
| Aclou | Aclou |
| Acoma | Pueblo Acoma |
| Acomys | Acomys |
| Acon | Acon |
| Aconcagua | Aconcagua |
| Acorn Computer Group | Acorn |
| ACPI | Advanced Configuration and Power Interface |
| Acq | Acq |
| Acquarossa | Acquarossa |
| Acquaviva | Acquaviva |
| Acqueville | Acqueville |
| Acqui Terme | Acqui Terme |
| Acquigny | Acquigny |
| Acquin-Westbécourt | Acquin-Westbécourt |
| Acquis communautaire | Acquis communautaire |
| Acrab | Beta Scorpii |
| Acre | Acre |
| Acri | Acri |
| Acrux | Alpha Crucis |
| ACT | ACT New Zealand |
| Acta Apostolicae Sedis | Acta Apostolicae Sedis |
| Acta Diurna | Acta Diurna |
| Acting-out | Acting out |
| Action directe | Action directe |
| Action Internationale Contre la Faim | Action contre la faim |
| Action painting | Action Painting |
| Action research | Recherche-action |
| Action RPG | Action-RPG |
| Action-Uniqa | Équipe cycliste Intel-Action |
| ActionScript | ActionScript |
| Active Denial System | Active Denial System |
| Active Directory | Active Directory |
| Active Server Pages | Active Server Pages |
| Actor network theory | Théorie des acteurs-réseaux |
| Actors Studio | Actors Studio |
| Aculeata | Aculeata |
| Acura | Acura |
| Acura Classic | Classic de San Diego |
| Acy | Acy |
| Acy-en-Multien | Acy-en-Multien |
| Acy-Romance | Acy-Romance |
| Acydofil | Acidophile |
| Acyklowir | Aciclovir |
| Aczyńsk | Atchinsk |
| AD | AD |
| ad hoc | ad hoc |
| Ad-Aware | Ad-Aware |
| Ad-Dachila | Ad-Dakhla |
| Ad-Dachla | Dakhla |
| Ad-Dali | Dhala |
| Ad-Dauha | Doha |
| Ad-Hoc | Mobile Ad-hoc NETworks |
| Ada | Ada |
| Ada Lovelace | Ada Lovelace |
| ADAC | ADAC |
| Adachi | Adachi |
| Adad | Adad |
| Adadnirari I | Adad-nerari Ier |
| Adadnirari II | Adad-Nirari II |
| Adadnirari III | Adad-Nerari III |
| Adaincourt | Adaincourt |
| Adainville | Adainville |
| Adaks | Addax |
| Adalard | Adélard de Corbie |
| Adalbert | Adalbert |
| Adalgunda | Aldegonde |
| Adaloald | Adaloald |
| Adam | Adam |
| Adam Albert Neipperg | Adam Albert de Neipperg |
| Adam Asnyk | Adam Asnyk |
| Adam Chmielowski | Adam Chmielowski |
| Adam Clayton | Adam Clayton |
| Adam Czerniaków | Adam Czerniaków |
| Adam Darski | Nergal |
| Adam de la Halle | Adam de la Halle |
| Adam Gabriel Garcia | Adam Garcia |
| Adam Heinrich Müller | Adam Müller |
| Adam i Ewa | Adam |
| Adam Jerzy Czartoryski | Adam Jerzy Czartoryski |
| Adam Kazimierz Czartoryski | Adam Kazimierz Czartoryski |
| Adam Kozłowiecki | Adam Kozlowiecki |
| Adam Levine | Adam Levine |
| Adam Małysz | Adam Małysz |
| Adam Mickiewicz | Adam Mickiewicz |
| Adam Nelson | Adam Nelson |
| Adam Opel AG | Opel |
| Adam Sandler | Adam Sandler |
| Adam Smith | Adam Smith |
| Adam Stanisław Naruszewicz | Adam Stanisław Naruszewicz |
| Adam Stefan Sapieha | Adam Stefan Sapieha |
| Adam Weishaupt | Adam Weishaupt |
| Adam z Bremy | Adam de Brême |
| Adam-lès-Passavant | Adam-lès-Passavant |
| Adam-lès-Vercel | Adam-lès-Vercel |
| adamaszek | damas |
| Adamnan | Adomnan |
| Adams | Adams |
| Adamstown | Adamstown |
| Adamswiller | Adamswiller |
| Adana | Adana |
| Adansi North | Adansi nord |
| Adansi South | Adansi sud |
| Adapalen | Adapalène |
| Adapazarı | Adapazarı |
| adapter | adaptateur |
| Adar | Adar |
| Adara | Epsilon Canis Majoris |
| Adast | Adast |
| Adazaur | Adasaurus |
| AdBusters | Adbusters |
| Add-on | Plugin |
| Adda | Adda |
| Addiopizzo | Addiopizzo |
| Addis Abeba | Addis-Abeba |
| Addycja elektrofilowa | Addition électrophile |
| adekwatność | adéquation |
| adekwatny | approprié |
| Adela | Adèle |
| Adela z Szampanii | Adèle de Champagne |
| Adelaide | Adélaïde |
| Adelaide Football Club | Adelaide Football Club |
| Adelajda | Adélaïde |
| Adelajda Burgundzka | Adélaïde de Bourgogne |
| Adelajda Sachsen-Meiningen | Adélaïde de Saxe-Meiningen |
| Adelange | Adelange |
| Adelans-et-le-Val-de-Bithaine | Adelans-et-le-Val-de-Bithaine |
| Adelard z Bath | Adélard de Bath |
| Adelgunde Bawarska | Aldegonde de Bavière |
| Adelina Patti | Adelina Patti |
| Adelsheim | Adelsheim |
| Ademar z Monteil | Adhémar de Monteil |
| Ademir Marques de Menezes | Ademir |
| Aden | Aden |
| Aden Abdullah Osman Daar | Aden Abdullah Osman Daar |
| adenina | adénine |
| Adenotomia | Adénoïdectomie |
| Adenowirusy | Adenoviridae |
