| adelsman | nobleman |
| adelstitel | sir |
| Adem Jashari | Adem Jashari |
| Aden | Aden |
| Aden Abdullah Osman Daar | Aden Abdullah Osman Daar |
| Adenin | Adenine |
| adenohypofys | adenohypophysis |
| adenom | adenoma |
| adenosin | adenosine |
| Adenosindifosfat | Adenosine diphosphate |
| adenosinmonofosfat | adenosine monophosphate |
| Adenosintrifosfat | Adenosine triphosphate |
| Adenovirus | Adenoviridae |
| Adenviken | Gulf of Aden |
| Adeodatus I | Pope Adeodatus I |
| Adeodatus II | Pope Adeodatus II |
| aderton | eighteen |
| Adewale Akinnuoye-Agbaje | Adewale Akinnuoye-Agbaje |
| ADHD | Attention-deficit hyperactivity disorder |
| Adhemar Ferreira da Silva | Adhemar da Silva |
| adhesion | adhesion |
| Adhesiv kapsulit | Frozen shoulder |
| Adhémarslottet | Château des Adhémar |
| Adi Dassler | Adolf Dassler |
| Adi Shamir | Adi Shamir |
| Adi Shankara | Adi Shankara |
| ADI-värde | acceptable daily intake |
| adiabatisk | adiabatic |
| Adiabatisk process | Adiabatic process |
| Adiabene | Adiabene |
| Adidas | Adidas |
| Adige | Adige |
| adipocyt | adipocyte |
| Adirondack Mountains | Adirondack Mountains |
| Aditi | Aditi |
| Adium | Adium |
| Adium X | Adium |
| Adivasi | Adivasi |
| adjektiv | adjective |
| adjektivisk | adjectival |
| Adjib | Anedjib |
| adjungera | co-opt |
| adjutant | adjutant |
| adjö | adieu |
| adla | knight |
| Adlai Stevenson | Adlai Stevenson |
| Adler | Adler |
| adlig | titled |
