| Alcàntera de Xúquer | Alcàntera de Xúquer |
| Alcàsser | Alcàsser |
| Alcázar | Alcázar di Siviglia |
| Alcázar of Seville | Alcázar di Siviglia |
| Alcázar of Toledo | Alcázar di Siviglia |
| Alcúdia | Alcúdia |
| Aldabra | Aldabra |
| Aldabra Giant Tortoise | Geochelone gigantea |
| Aldaia | Aldaia |
| Aldair | Aldair |
| Aldamir | Aldamir |
| Aldan Airport | Aldan |
| Aldan River | Aldan |
| Aldebaran | Aldebaran |
| aldebaranium | aldebaranio |
| aldehyde | aldeide |
| alder | ontano |
| alder tree | alno |
| Alderaan | Alderaan |
| alderman | consigliere comunale |
| Alderney | Alderney |
| Aldersbach | Aldersbach |
| alderwoman | assessore comunale |
| Aldi | ALDI |
| Aldine | aldino |
| Aldine Press | Aldine |
| Aldingen | Aldingen |
| Aldo Ciccolini | Aldo Ciccolini |
| Aldo Moro | Aldo Moro |
| Aldo Olivieri | Aldo Olivieri |
| Aldobrandeschi family | Aldobrandeschi |
| aldol | aldolo |
| Aldol condensation | Condensazione aldolica |
| aldolase | aldolasi |
| aldosterone | aldosterone |
| Aldous Huxley | Aldous Huxley |
| Aldrans | Aldrans |
| Aldrovanda | Aldrovanda |
| Aldrovanda vesiculosa | Aldrovanda vesiculosa |
| Aldudes | Aldudes |
| Aldus | Aldus Corporation |
| Aldus Manutius | Aldo Manuzio |
| ale | ale |
| Alea iacta est | Alea iacta est |
| aleatory | malsicuro |
| Aleatory variable | Variabile casuale |
| Alec Baldwin | Alec Baldwin |
| Alec Douglas-Home | Alec Douglas-Home |
| Alec Guinness | Alec Guinness |
| Alec Issigonis | Alec Issigonis |
| Alecto | Aletto |
| Alectoris | Alectoris |
| Alectrosaurus | Alectrosaurus olseni |
| Alectryon | Alectrione |
| Alegia | Alegia |
| Alegria | Felicità |
| Alegría de Álava | Alegría |
| Aleister Crowley | Aleister Crowley |
| Alejandra Pizarnik | Alejandra Pizarnik |
| Alejandro Amenábar | Alejandro Amenábar |
| Alejandro Cichero | Alejandro Cichero |
| Alejandro de Humboldt National Park | Parco nazionale Alejandro de Humboldt |
| Alejandro de Tomaso | Alejandro De Tomaso |
| Alejandro Fernández | Alejandro Fernández |
| Alejandro González Iñárritu | Alejandro González Iñárritu |
| Alejandro Jodorowsky | Alejandro Jodorowsky |
| Alejandro Planchart | Alejandro Planchart |
| Alejandro Ramírez | Alejandro Ramírez |
| Alejandro Toledo | Alejandro Toledo |
| Alejandro Valverde | Alejandro Valverde |
| Alejo Carpentier | Alejo Carpentier |
| Aleksa Šantić | Aleksa Šantić |
| Aleksandar Luković | Aleksandar Luković |
| Aleksandar Nikolić | Aleksandar Nikolić |
| Aleksandar Pavlović | Aleksandar Pavlović |
| Aleksandar Đorđević | Aleksandar Đorđević |
| Aleksandar Šapić | Aleksandar Šapić |
| Aleksander Kwaśniewski | Aleksander Kwaśniewski |
| Aleksander Waleriańczyk | Aleksander Walerianczyk |
| Aleksander Wojtkiewicz | Aleksander Wojtkiewicz |
| Aleksandr | Alessandro |
| Aleksandr Andronov | Aleksandr Andronov |
