| Actio (rimsko pravo) | Action française | Action-adventure |
| Activa | Activision | Acton |
| Actors Studio | Actors' Studio | Acuši Janagisava |
| Acuši Jonejama | Acuši Natori | Acuši Učijama |
| Acuhiro Miura | Acujoši Furuta | Aculepeira ceropegia |
| Aculepeira vachoni | Acura | Acuto Učida |
| Aczino | Ad | AD |
| Ad abolendam | Ad Astra: Pot do zvezd | Ad beatissimi apostolorum |
| Ad Deir | Ad exstirpanda | Ad gentes Divinitus |
| Ad Gentes Divinitus | Ad hoc | Ad Iubileum |
| Ad libitum | Ad Pirum | Ad providam |
| AD Scout | Ad Simonis | Ad-hoc |
| Ada | Ada (ime) | Ada (informatika) |
| Ada (programski jezik) | Ada (razločitev) | Ada Adler |
| Ada Škerl | Ada Bojana | Ada Ciganlija |
| Ada E. Yonath | Ada Karijska | Ada Klanjšek |
| Ada Krivec | Ada Krivic | Ada Lovelace |
| Ada Smolnikar | Ada Smolnikar–Bešter | Ada Vidovič Muha |
| Ada Yonath | Ada, Šodolovci | Ada, Srbija |
| Adaševci | Adab | Adacs |
| Adacta | Adad | Adad-nirari I. |
| Adad-nirari III. | Adadnirari I. | Adagietto |
| Adagio | Adagissimo | Adair |
| Adalbero (Štajerski) | Adalbero Štajerski | Adalbero, Koroški vojvoda |
| Adalbert Balta | Adalbert Fluck von Raggamb | Adalbert iz Egmonda |
| Adalbert Praški | Adalbert Sorsich von Severin | Adalbert Stifter |
| Adalbert Stubel | Adalberto, vojvoda Bergama | Adalbertus Ranconis de Ericinio |
| Adalet ve Kalkınma Partisi | Adalgis | Adalgizel |
| Adalia bipunctata | Adalimumab | Adam |
| Adam (Biblija) | Adam (gora) | Adam (priimek) |
| Adam (razločitev) | Adam (Sveto pismo) | Adam A500 |
| Adam A700 | Adam Albert von Neipperg | Adam Berke |
| Adam Bilzerian | Adam Bohorič | Adam Bokany |
| Adam Carson | Adam Custine | Adam de la Halle |
| Adam de St. Victor | Adam De St. Victor | Adam Eckersley |
| Adam Eggich | Adam Farkaš | Adam Ferguson |
| Adam Georg von Agthe | Adam Gnezda Čerin | Adam Gruenfeld |
| Adam Helmer | Adam in Eva | Adam in Eva (Dürer) |
| Adam Ivanoci | Adam Ivanocy | Adam Ivanovič Balla |
| Adam Johann von Krusenstern | Adam Joseph Maida | Adam Korol |
| Adam Korytowski | Adam Kozłowiecki | Adam Kozlowiecki |
| Adam Levine | Adam Lutar | Adam Luthar |
| Adam Małysz | Adam Malysz | Adam Mickiewicz |
| Adam Nagaitis | Adam Neipperg | Adam Oates |
| Adam Olearius | Adam Ondra | Adam Otto Wilhelm von Bistram |
| Adam Petrovič Ožarovski | Adam Philippe, Comte de Custine | Adam Possamai |
| Adam Ramelmayer | Adam Rammelmeyer | Adam Ravbar |
| Adam Ravbar (vitez) | Adam Richard Wiles | Adam Rosales |
| Adam Sandler | Adam Schall | Adam Sedgwick |
| Adam Skalar | Adam Smith | Adam St. Victor |
| Adam Stefan Sapieha | Adam Weishaupt | Adam Weiss |
| Adam's Apple | Adami | Adamič |
| Adamič-Lundrovo nabrežje | Adamič-Lundrovo nabrežje, Ljubljana | Adamičeva cesta |
| Adamičeva cesta, Grosuplje | Adamić | Adamit |
| Adamiti | Adamizem | Adamo Stefano Sapieha |
| Adamov most | Adamov vrh | Adamovec |
| Adamović | Adamovo | Adamovo jabolko |
| Adams | Adamsville | Adamsville, Alabama |
| Adamswiller | Adana | Adana (provinca) |
| Adansonia | Adansonia digitata | Adaptivna optika |
| ADATS | Adács | Adásztevel |
| Adélard Godbout | Adílson Batista | Adıyaman (provinca) |
| Adûnakhôr | Adžamovci | Adžarija |
| Adžići | Adžib | Adžine Livade |
| ADB (identifikator) | ADCOMSUBORDCOMPHIBSPAC | Adda |
| Addams | Addis Abeba | Addis Abebe |
| Addison | Addisonova bolezen | Addizione Erculea |
| Addobbati | Addukcija | Ade Akinbiyi |
| Adefovir | Adela | Adela Šajn |
| Adela Žgur | Adela Flandrijska | Adela Milčinović |
| Adela Noriega | Adelaide | Adelaide Street Circuit |
| Adelajda | Adelajda del Vasto | Adelajda Holandska |
| Adelajda Ogrska | Adelajda Ogrska (u. 1140) | Adelajda Ortenburška |
| Adelajda Ortenburško-Radovljiška | Adelajda Zutphenska | Adelard |
| Adelard Godbout | Adelard iz Batha | Adelbert Ames |
| Adelbert von Chamisso | Adelboden | Adelchi Serena |
| Adele | Adele Laurie Blue Adkins | Adelfat |
| Adelhard Roidinger | Adelijina dežela | Adelijina zemlja |
| Adelijski pingvin | Adelina | Adeline |
| Adeline Virginia Woolf | Adelma Vay de Vaya | Adelma von Vay |
| Adelschi Serena | Adelson-Velski | Adelstein |
| Adem | Adem Kapič | Adem Kastrati |
| Ademar iz Puya | Ademar Monteilski | Ademi |
| Aden | ADEN top | Aden, Jemen |
| Aden, Južni Jemen | Adenilat ciklaza | Adenilat-ciklaza |
| Adenilatciklaza | Adenilatna ciklaza | Adenilciklaza |
| Adenililciklaza | Adenin | Adenitis |
| Adenium obesum | Adenohipofiza | Adenokarcinom |
| Adenovirus | Adenovirusi | Adenozin trifosfat |
| Adenozin-5'-trifosfat (ATP) | Adenozin-trifosfat | Adenozintrifosfat |
| Adenska kultura | Adenski zaliv | Adeodato Giovanni Piazza |
| Ader Eole | Aderščina | Adergas |
| Adewale Agbaje | Adewale Akinnuoye - Agbaje | Adewale Akinnuoye Agbaje |
| Adewale Akinnuoye-Agbaje | ADFGVX | ADFGX |
| ADH | Adhan | Adhémar |
| ADHD | Adhemar | Adhemar da Silva |
| Adhemar Ferreira da Silva | Adherenca | Adhezijske molekule |
| Adhokracija | Adi | Adi Šankara |
| Adi Smolar | Adi Vidmajer | Adiabata |
| Adiabatna preobrazba | Adiabatna sprememba | Adiabatna stisljivost |
