| Acetilperoksid | Acetilsalicilna kislina | Aceton |
| Aceton cianohidrin | Aceton peroksid | Acetoncianhidrin |
| Acetonitril | Acetonnitril | Acetylcholine |
| ACF Fiorentina | ACh | ACH Volley |
| Achard | Achatina fulica | Achenheim |
| Acherontia atropos | Achille Baraguay | Achille Baraguey d'Hilliers |
| Achille Bazaine | Achille Bocchi | Achille Compagnoni |
| Achille D'Havet | Achille Lauro | Achille Lauro (pevec) |
| Achille Liènart | Achille Liénart | Achille Lienart |
| Achille Locatelli | Achille Manara | Achille Mbembe |
| Achille Silvestrini | Achille Starace | Achille Varzi |
| Achille-Fernand-Hector Dassonville | Achille-Paul-Théophile Delay | Achillea |
| Achillea atrata | Achillea clavenae | Achillea clavennae |
| Achillea eupatorium | Achillea filicifolia | Achillea filipendulina |
| Achillea millefolium | Achilles (razločitev) | Achilleus Kewanuka |
| Achim von Arnim | 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 |
