| ATP Challenger Series | ATP Challenger Series |
| ATP de Rotterdam | ABN AMRO World Tennis Tournament |
| ATP International Series Gold | ATP International Series Gold |
| ATP Masters Series | ATP Masters Series |
| ATP-sintetasa | ATP synthase |
| ATPasa | ATPase |
| atrabiliario | bilious |
| atrabilioso | bilious |
| ATRAC | Adaptive Transform Acoustic Coding |
| atracadero | anchorage |
| atracador | robber |
| atracadora | robber |
| atracar | hold up |
| atracción | draw |
| Atracción fatal | Fatal Attraction |
| atracción sexual | sex appeal |
| atracción turística | sight |
| atracina | atrazine |
| atraco | armed robbery |
| Atractantha | Actinocladum verticillatum |
| atractiva | atractive |
| atractiva a primera vista | slick |
| atractivo | charm |
| atractivo sexual | sex appeal |
| Atractor de Lorenz | Lorenz attractor |
| atracón | binge |
| atraer | lure |
| atraer a | attract |
| atraer la atención | catch the eye |
| atragantarse | choke |
| Atrahasis | Atra-Hasis |
| Atrak | Atrek River |
| atrancarse | stuck |
| atranco | constipation |
| Atrani | Atrani |
| Atrapa a un ladrón | To Catch a Thief |
| Atrapa esa Liebre | Catch that Rabbit |
| atrapado | jammed |
| Atrapado en los suburbios | Stuck in the Suburbs |
| atrapado en una esquina | wedge in the corner |
| atrapado por la nieve | snowbound |
| atrapamoscas | tyrant flycatcher |
| Atrapanieblas | Fog collection |
| atrapar | trap |
| atrapar en una red | catch |
| atrapasueños | dreamcatcher |
| atraque | docking |
| atrasado | simple |
| atrasado mental | mentally deficient |
| atrasarse | lag |
| atraso | backwardness |
| atrasos | arrears |
| Atrato | Atrato River |
| atravesado | oblique |
| atravesar | transfer |
| Atrax robustus | Australasian funnel-web spider |
| atraído | attracted |
| Atreo | Atreus |
| atreverse | dare |
| atrevida | adventurer |
| atrevido | audacious |
| atrevimiento | adventurousness |
