| ATS | ATS |
| ATSC Standards | ATSC |
| Atta | Atta |
| Atta sexdens | Atta |
| attach | afirmar |
| attached | anexo |
| attached to | afecto |
| attachment | unión |
| Attachment theory | Teoría del apego |
| attachments | accesorio |
| attaché | agregado |
| attaché case | cartera |
| attack | ataque |
| attack of dizziness | mareo |
| attack of sneezing | ataque estornutatorio |
| Attack on Gleiwitz radio station | Operación Himmler |
| Attack on Mers-el-Kébir | Batalla de Mers el-Kebir |
| Attack on Pearl Harbor | Ataque a Pearl Harbor |
| attacker | agresor |
| attacking | combativo |
| Attacks on North America during World War II | Ataques al territorio de Estados Unidos durante la Segunda Guerra Mundial |
| Attacus atlas | Attacus atlas |
| attain | alcanzar |
| attainable | realizable |
| attainment | realización |
| Attalens | Attalens |
| Attalid dynasty | Dinastía atálida |
| Attalus | Átalo |
| Attalus I | Atalo I |
| Attalus II Philadelphus | Atalo II |
| Attalus III | Atalo III |
| attanuate | aliviar |
| Attapeu Province | Provincia de Attapeu |
| Attapu | Provincia de Attapeu |
| Attapu Province | Provincia de Attapeu |
| Attelabidae | Attelabidae |
| attempt | ensayo |
| attempts | ensayado |
| attend | atender |
| attend church service | reverenciar |
| attend on | asistir a |
| attend to | encargarse de |
| attendance | concurrencia |
| attendant | presente |
| attendee | asistente |
| attender | servidor |
| attending | concomitante |
| attention | consideración |
| attentive | alerta |
| attentively | atentamente |
| attentiveness | consideración |
| attenuate | disminuir |
| attenuation | atenuación |
| Atterberg limits | Límites de Atterberg |
| attest | conjurar |
| attestation | certificado |
| attic | desván |
| Attic calendar | Calendario ático |
| Attic numerals | Numeración ática |
| Attic style | Ática |
| Attica | Ática |
| Attignat | Attignat |
| Attila | Atila |
| Attila Csihar | Attila Csihar |
| Attila the Hun | Atila |
| Attilâ İlhan | Atilla Ilhan |
| Attinghausen | Attinghausen |
| attire | traje |
| Attiswil | Attiswil |
| attitude | cese |
| attorney | abogado |
