| ad libitum | a discreción |
| Ad Majorem Dei Gloriam | Ad maiorem Dei gloriam |
| ad nauseam | ad náuseam |
| AD São Caetano | Associação Desportiva São Caetano |
| Ad van den Berg | Adrian Vandenberg |
| Ad-aware | Ad-Aware |
| Ada | Lenguaje de programación Ada |
| Ada Lovelace | Ada Lovelace |
| Adab | Adab |
| Adad | Ishkur |
| Adad-nirari I | Adad-nirari I |
| adagio | adagio |
| adagium | adagio |
| Adaja | Adaja |
| Adalbert van Praag | Adalberto de Praga |
| Adam | Adán |
| Adam Clayton | Adam Clayton |
| Adam Copeland | Adam Copeland |
| Adam de la Halle | Adam de la Halle |
| Adam Elsheimer | Adam Elsheimer |
| Adam en Eva | Adán y Eva |
| Adam Jerzy Czartoryski | Adam Jerzy Czartoryski |
| Adam Johann von Krusenstern | Adam Johann von Krusenstern |
| Adam Levine | Adam Levine |
| Adam Małysz | Adam Małysz |
| Adam Mickiewicz | Adam Mickiewicz |
| Adam Oehlenschläger | Adam Oehlenschläger |
| Adam Opel | Adam Opel |
| Adam Sandler | Adam Sandler |
| Adam Savage | Adam Savage |
| Adam Smith | Adam Smith |
| Adam van Bremen | Adán de Bremen |
| Adam Weishaupt | Adam Weishaupt |
| adamant | adamantino |
| Adamantisaurus | Adamantisaurus |
| Adamantium | Adamantio |
| Adamawa | Adamawa |
| Adamclisi | Adamclisi |
| Adamiet | Adamita |
| Adams | Adams |
| Adams County | Condado de Adams |
| Adams-Onísverdrag | Tratado de Adams-Onís |
| adamsappel | nuez de Adán |
| adamskostuum | como su madre le trajo al mundo |
| adamsnaald | yuca |
| Adamstown | Adamstown |
| Adamswiller | Adamswiller |
| Adana | Adana |
| Adapa | Alulim |
| adapteerbaar | adaptable |
| adapter | adaptador |
| adaptief | adaptable |
| Adaptieve radiatie | Radiación adaptativa |
| Adar | Adar |
| Adasaurus | Adasaurus |
| Add-on | Plugin |
| Adda | Río Adda |
| Addax | Addax nasomaculatus |
| addendum | apéndice |
| adder | víbora |
| Adderringslang | Natrix maura |
| Adders | Viperidae |
| Adderwortel | Polygonum bistorta |
| Addis Abeba | Adís Abeba |
| additief | aditivo |
| Additieve kleurmenging | Síntesis aditiva de color |
| Additieve synthese | Síntesis aditiva |
| additioneel | más |
| Address Resolution Protocol | Address Resolution Protocol |
| adel | aristocracia |
| Adela | Adela |
| Adela van Engeland | Adela de Normandía |
| Adela van Hamaland | Adela de Normandía |
| Adela van Mesen | Adela de Francia |
| adelaar | águila |
