| absurd | absurdo |
| absurdalny | absurdo |
| absurdyzm | absurdismo |
| absynt | ajenjo |
| Absyrtos | Apsirto |
| absztyfikant | galanteador |
| Abu Bakr | Abu Bakr as-Siddiq |
| Abu Gurab | Abu Gurab |
| Abu Kir | Abukir |
| Abu Mena | Abu Mena |
| Abu Musab al-Zarkawi | Abu Musab al Zarqaui |
| Abu Nidal | Abu Nidal |
| Abu Roasz | Abu Roash |
| Abu Simbel | Abu Simbel |
| Abu Zabi | Abu Dhabi |
| Abudantia | Abundantia |
| Abudża | Abuya |
| Abusir | Abusir |
| Abwehra | Abwehr |
| aby | para que |
| Aby nie | No sea que |
| Abydos | Abidos |
| Abzac | Abzac |
| Abzu | Apsu |
| abzymy | abzima |
| Abéché | Abéché |
| Abédi Pelé | Abédi Pelé |
| AC Ajaccio | Athletic Club Ajaccien |
| AC Cars | AC |
| AC Cesena | Associazione Calcio Cesena |
| AC Lugano | Associazione Calcio Lugano |
| AC Mantova | Associazione Calcio Mantova |
| AC Siena | Associazione Calcio Siena |
| Academia Bogota | Academia Fútbol Club |
| Academia Română | Academia Rumana |
| Acadian Driftwood | The Band |
| Académica Coimbra | Académica de Coimbra |
| Acanthosis nigricans | Acantosis nigricans |
| Acapulco | Acapulco de Juárez |
| Acarígua | Acarigua |
| Acassuso Buenos Aires | Club Atlético Acassuso |
| ACB | Asociación de Clubs de Baloncesto |
| Accelerated Graphics Port | Accelerated Graphics Port |
| Access Control List | Lista de control de acceso |
| Access Point | Punto de acceso |
| Access Point Name | Nombre de punto de acceso |
| Accons | Accons |
| Ace of Base | Ace of Base |
| acefalia | acefalía |
| Aceh | Aceh |
| Acena | Aquisgrán |
| Acer | Acer |
| acerola | acerola |
| Acerra | Acerra |
| Acesulfam | Acesulfamo-k |
| Acetabularia | Acetabularia |
| acetaldehyd | acetaldehído |
| acetamid | acetamida |
| acetofenon | acetofenona |
| aceton | acetona |
| acetylen | acetileno |
| Acetylocholina | Acetilcolina |
| Acetylocholinesteraza | Colinesterase |
| Acetylowanie | Acetilación |
| ACF Fiorentina | Associazione Calcio Fiorentina |
| ach | ¡ay! |
| Achab | Acab |
| Achaja | Achaea |
| Achajowie | Aqueo |
| Achalazja przełyku | Achalasia |
| Acharnejczycy | Los acarnienses |
| Acharonim | Ajaronim |
| Acheiropoietos | Mandylion |
| Acheloos | Aqueloo |
| Achelozaur | Achelousaurus |
| Achemenes | Aquemenes |
| Achemenidzi | Aqueménida |
| Achenheim | Achenheim |
| Achernar | Achernar |
| Acheron | Aqueronte |
| Achery | Achery |
| Acheville | Acheville |
| Achicourt | Achicourt |
| Achiet-le-Grand | Achiet-le-Grand |
| Achiet-le-Petit | Achiet-le-Petit |
| Achille Webo | Pierre Webó |
| Achilles | Aquiles |
| Achilles Tatios | Aquiles Tacio |
| Achillobator | Achillobator |
| Achiote | Bixa orellana |
| Achitofel | Ajitófel |
| Achlorhydria | Aclorhidria |
| Achmad Kadyrow | Akhmad Kadyrov |
| Achmim | Panópolis |
| achondroplazja | acondroplasia |
| Achoris | Acoris |
| Achtersztag | Burda |
| Achtopol | Akhtopol |
| Achy | Achy |
| Achères-la-Forêt | Achères-la-Forêt |
| ACID | ACID |
| Acid Drinkers | Acid Drinkers |
| Acid house | Acid house |
| Acid rock | Rock ácido |
| Acid-jazz | Acid jazz |
| Acigné | Acigné |
| Acireale | Acireale |
| Acis | Acis |
| ACK | ACK |
| Acklay | Acklay |
| Aclens | Aclens |
| Aclou | Aclou |
| Acoma | Acoma |
| Acomys | Acomys |
| Acon | Accons |
| Aconcagua | Aconcagua |
| ACPI | Advanced Configuration and Power Interface |
| Acq | Acq |
| Acquarossa | Acquarossa |
| Acquaviva | Acquaviva |
| Acqueville | Acqueville |
| Acquin-Westbécourt | Acquin-Westbécourt |
| Acquis communautaire | Acervo comunitario |
| Acrab | Acrab |
| Acre | Acre |
