| adrénaline | adrenalina |
| AdSense | AdSense |
| adsorption | adsorción |
| adulaire | adularia |
| adulateur | adulador |
| adulation | alabanza |
| adulation de soi-même | presunción |
| adulatrice | adulador |
| adulte | crecer |
| adultère | adúltero |
| adustion | cauterización |
| Advance Australia Fair | Advance Australia Fair |
| Advanced Access Content System | Advanced Access Content System |
| Advanced Audio Coding | Advanced Audio Coding |
| Advanced Configuration and Power Interface | Advanced Configuration and Power Interface |
| Advanced Linux Sound Architecture | Arquitectura de Sonido Avanzada para Linux |
| Advanced Micro Devices | Advanced Micro Devices |
| Advanced Packaging Tool | Advanced Packaging Tool |
| Advanced Power Management | APM |
| Advanced RISC Machines | ARM |
| Advanced Streaming Format | Advanced Streaming Format |
| Advanced Technology Attachment | Integrated Drive Electronics |
| Advanced Technology Extended | ATX |
| Advanced telecom computer architecture | Advanced Telecommunications Computing Architecture |
| Advanced Television Systems Committee | ATSC |
| advection | advección |
| advenir | pasar |
| adventice | auxiliar |
| Adventisme | Iglesia Adventista del Séptimo Día |
| adverbe | adverbio |
| adverbial | adverbial |
| adverbialiser | adverbializar |
| Advergame | Advergaming |
| adversaire | antagonista |
| adverse | antipático |
| adversité | adversidad |
| advienne que pourra | pase lo que pase |
| Advokat | Abogado |
| AdWords | AdWords |
| Adyguée | Adiguesia |
| Adyguéens | Lenguas circasianas |
| Adèle | Corylus |
| Adèle de Champagne | Adela de Champaña |
| Adèle de France | Adela de Francia |
| Adèle de Savoie | Adela de Saboya |
| Adélard de Bath | Adelardo de Bath |
| Adélaïde | Adelaida |
| Adélaïde de Bourgogne | Adelaida |
| Adélaïde de Louvain | Adela de Louvain |
| Adélaïde de Saxe-Meiningen | Adelaida de Sajonia-Meiningen |
| Adélaïde de Suse | Adelaida de Susa |
| adénine | adenina |
| Adénocarcinome | Adenocarcinoma |
| Adénosine diphosphate | Adenosín difosfato |
| Adénosine monophosphate cyclique | Adenosín monofosfato cíclico |
| Adénosine triphosphate | Adenosín trifosfato |
| adénoïde | adenoide |
| Adénylate cyclase | Adenilato ciclasa |
| Adéodat Ier | Adeodato I |
| Adéodat II | Adeodato II |
| adéquat | apropiado |
| adéquatement | adecuadamente |
| adéquation | adecuación |
