| alcoholismo | alcoholism |
| alcoholímetro | breathalyzer |
| alcohólica | alcoholic |
| alcohólico | alcoholic |
| Alcohólicos Anónimos | Alcoholics Anonymous |
| Alcol | Alcohol |
| Alcolecha | Alcoleja |
| Alcor Life Extension Foundation | Alcor Life Extension Foundation |
| Alcorcón | Alcorcón |
| alcornoque | cork oak |
| Alcorán | Koran |
| alcotest | breathalyzer |
| Alcudia | Alcúdia |
| Alcuino de York | Alcuin |
| Alcácer | Alcàsser |
| Alcámenes | Alcamenes |
| Alcántara de Júcar | Alcàntera de Xúquer |
| alcázar | quarterdeck |
| Alcázar de Segovia | Alcázar of Segovia |
| Alcázar de Toledo | Alcázar of Toledo |
| Alcínoo | Alcinous |
| Alcíone | Alcyone |
| aldaba | knocker |
| Aldabra | Aldabra |
| aldabón | knocker |
| Aldamir | Aldamir |
| Aldaya | Aldaia |
| aldea | village |
| Aldea de la Reina | Petit hameau |
| Aldea Oculta de la Arena | Land of Wind |
| Aldea Oculta del Sonido | Land of Sound |
| aldeana | farmer |
| aldeano | farmer |
| Aldeas | Village |
| Aldebarán | Aldebaran |
| Aldebarán de Tauro | Taurus Aldebaran |
| Aldeburgh | Aldeburgh |
| aldehído | aldehyde |
| Alderaan | Alderaan |
| Alderney | Alderney |
| Aldi | Aldi |
| Aldino | Aldein |
| Aldo Manucio | Aldus Manutius |
| Aldo Moro | Aldo Moro |
| Aldo Van Eyck | Aldo van Eyck |
| aldolasa | aldolase |
| Aldor | Aldor |
| aldosa | aldose |
| Aldous Huxley | Aldous Huxley |
| Aldudes | Aldudes |
| aldónico | aldonic |
| ale | ale |
| Ale Yarok | Ale Yarok |
| Alea iacta est | Alea iacta est |
| aleacion | alloy |
| aleación | alloy |
| Aleación de cinc y aluminio | Zama Minor |
| aleado | alloyed |
| alear | alloy |
| aleatoriamente | ramdomly |
| aleatorio | dubious |
| alebrarse | despond |
| Alec Baldwin | Alec Baldwin |
| Alec Douglas-Home | Alec Douglas-Home |
| Alec Guinness | Alec Guinness |
| aleccionar | teach |
| Alecto | Alecto |
| Alectoris barbara | Barbary Partridge |
| Alectrión | Alectryon |
| Alectrosaurus | Alectrosaurus |
| Alectura lathami | Australian Brush-turkey |
| alef | aleph |
