| ad hoc | ad hoc |
| Ad maiorem Dei gloriam | Ad maiorem Dei gloriam |
| Ad nauseam | Argumentum ad nauseam |
| ad náuseam | ad nauseam |
| Ad-Aware | Ad-Aware |
| Ada | Ada |
| Ada de Caria | Ada de Carie |
| Ada Lovelace | Ada Lovelace |
| Ada Mae Johnson | Violet Blue |
| Adachi | Adachi |
| Adad-nirari I | Adad-nerari Ier |
| adagio | adagio |
| Adai | Adaizan |
| Adalbert Krüger | Adalbert Krüger |
| Adalberta | Adalberta |
| Adalberto | Adalbert |
| Adalberto de Praga | Adalbert de Prague |
| Adalberto Álvarez y su Son | Adalberto Álvarez y su Son |
| Adalia bipunctata | Coccinelle à deux points |
| Adam | Adam |
| Adam Adalbert von Neipperg | Adam Albert de Neipperg |
| Adam Afzelius | Adam Afzelius |
| Adam Clayton | Adam Clayton |
| Adam Copeland | Adam Copeland |
| Adam Czerniaków | Adam Czerniaków |
| Adam Darski | Nergal |
| Adam de la Halle | Adam de la Halle |
| Adam Elsheimer | Adam Elsheimer |
| Adam Jerzy Czartoryski | Adam Jerzy Czartoryski |
| Adam Johann von Krusenstern | Johann Adam von Krusenstern |
| Adam Kazimierz Czartoryski | Adam Kazimierz Czartoryski |
| Adam Levine | Adam Levine |
| Adam Małysz | Adam Małysz |
| Adam Mickiewicz | Adam Mickiewicz |
| Adam Philippe de Custine | Adam Philippe de Custine |
| Adam Ries | Adam Ries |
| Adam Sandler | Adam Sandler |
| Adam Smith | Adam Smith |
| Adam von Bartsch | Adam von Bartsch |
| Adam Weishaupt | Adam Weishaupt |
| adamantino | inflexible |
| Adamantio | Adamantium |
| Adamantios Androutsopoulos | Adamantios Androutsopoulos |
| Adamantisaurus | Adamantisaurus |
| Adamismo | Adamites |
| Adamita | Adamite |
| Adams | Adams |
| Adamstown | Adamstown |
| Adamswiller | Adamswiller |
| Adana | Adana |
| Adansonia | Adansonia |
| Adansonia digitata | Baobab africain |
| adaptabilidad | adaptabilité |
| adaptable | adaptable |
| adaptaciones ecológicas | adaptation écologique |
| adaptación | conformité |
| adaptación del sistema métrico | adoption du système métrique |
| adaptado | adapté |
| adaptador | adaptateur |
| adaptar | ajuster |
| adaptar a | adapter à |
| adaptarse | s'adapter |
| adaptativo | adaptatif |
| Adar | Adar |
| adarvar | étourdir |
| Adasaurus | Adasaurus |
| Adastrea | Adrastée |
| AdC | Common Era |
| Addax nasomaculatus | Addax |
| Address Resolution Protocol | Address Resolution Protocol |
| adecuación | adéquation |
