| Achterhoek | Aci Bertoncelj | Acid |
| Acid Bath | Acid bath | Acidogena celica |
| Acidotično dihanje | Aciklovir | Acinarna žleza |
| Acinonyx | Acinonyx jubatus | Acinonyx jubatus jubatus |
| Acipenser heckelii | Acipenser ladanus | Acipenser naccari |
| Acipenser naccarii | Acipenser nardoi | Acipenser nasus |
| Acipenser nudiventris | Acipenser platycephalus | Acipenser ruthenus |
| Acipenser sturio | Acipenser sturionaster | Acipenser sturionellus |
| Acipenseridae | Acireale | Acker |
| Ackermann | Ackley, Iowa | Ackworth, Iowa |
| Aclypea opaca | Aclypea undata | ACM DL (identifikator) |
| ACM Slovenija | Acne inversa | Acne oleinica in picea |
| Acne vulgaris | Aco Babić | Aco Franc Šuštar |
| Aco Lebarič | ACOG | Aconcagua |
| Aconitum angustifolium | Aconitum napellus | Aconitum variegatum |
| Acosta | Acoustic Hearts of Winter | Acquired Immune Deficiency Syndrome |
| Acremonium | Acro Sport II | Acrocephalus |
| Acrocephalus (revija) | Acrocephalus arundinaceus | Acrocephalus schoenobaenus |
| Acroni Jesenice | ACS-100 Sora | Acsa |
| Acsalag | Acsád | Act of Settlement |
| ACTA | Acta Chimica Slovenica | Acta diurna |
| Acta ecclesiastica Sloveniae | Acta Ecclesiastica Sloveniae | Acta martyrum |
| Acta neophilologica | Acta Neophilologica | Acta theologica Sloveniae |
| Acta Theologica Sloveniae | Acting-out | Actiniaria |
| Actinopterygii | Actio | 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 |
