| ackumulerad | accumulato |
| ackumulering av miljöföroreningar | accumulo di inquinanti |
| ackurat | accurato |
| ackusativ | accusativo |
| Ackusativa språk | Lingua nominativo-accusativa |
| Ackusatoriskt system | Sistema accusatorio |
| Aclens | Aclens |
| Acoelomater | Celoma |
| Aconcagua | Aconcagua |
| Acorn | Acorn Computers |
| Acorn Archimedes | Acorn Archimedes |
| Acquarossa | Acquarossa |
| Acre | Acre |
| Acrefloden | Acre |
| Acrocanthosaurus atokensis | Acrocanthosaurus atokensis |
| Acrocephalus orinus | Acrocephalus orinus |
| actinid | attinidi |
| actinium | attinio |
| action | azione |
| Action Directe | Action Directe |
| Action française | Action Française |
| Action painting | Action painting |
| Action Replay | Action Replay |
| Actionfigur | Action figure |
| Actionscript | ActionScript |
| Active Server Pages | Active Server Pages |
| Actraiser | ActRaiser |
| Acura | Acura |
| AD | AD |
| ad hoc | ad hoc |
| Ad hominem-argument | Argumentum ad hominem |
| ad libitum | a piacere |
| ad nauseam | fino alla nausea |
| Ad-Daqahliyya | Governatorato di Dakahlia |
| Ada | Ada |
| Ada County | Contea di Ada |
| Ada Lovelace | Ada Lovelace |
| Adachi | Adachi |
| Adad | Adad |
| adagio | adagio |
| Adair County | Contea di Adair |
| Adam | Adamo |
| Adam av Bremen | Adamo da Brema |
| Adam Clayton | Adam Clayton |
| Adam Darski | Adam Michał Darski |
| Adam de la Halle | Adam de la Halle |
| Adam Elsheimer | Adam Elsheimer |
| Adam Ferguson | Adam Ferguson |
| Adam Levine | Adam Levine |
| Adam Małysz | Adam Małysz |
| Adam Mickiewicz | Adam Mickiewicz |
| Adam och Eva | Adamo |
| Adam Oehlenschläger | Adam Gottlob Oehlenschlager |
| Adam Opel | Adam Opel |
| Adam Sandler | Adam Sandler |
| Adam Smith | Adam Smith |
| Adam Weishaupt | Adam Weishaupt |
| adamant | adamantino |
| Adamawa | Adamawa |
| Adamello | Adamello |
| Adamit | Adamite |
| Adams | Adams |
| Adams County | Contea di Adams |
| Adamstown | Adamstown |
| adamsäpple | pomo d'Adamo |
