| a-bê-cê | ABC |
| A-ha | A-ha |
| A-League | A-League |
| A-side e B-side | A-side and B-side |
| a.m. | a.m. |
| AA | Automobile Association |
| AAA | American Automobile Association |
| AaB Aalborg | Aalborg Boldspilklub |
| Aabenraa | Aabenraa Municipality |
| Aabybro | Aabybro |
| Aachen | Aix-la-Chapelle |
| Aadorf | Aadorf |
| Aage Niels Bohr | Aage Niels Bohr |
| Aal | AAL |
| Aalborg | Aalborg |
| Aalen | Aalen |
| Aaleniano | Aalenian |
| Aalestrup | Aalestrup Municipality |
| Aaliyah | Aaliyah |
| Aalst | Alost |
| aaltura do serviço | theo the jobers |
| aalênio | Aalenian |
| AAMI Stadium | AAMI Stadium |
| Aarau | Aarau |
| Aarberg | Aarberg |
| Aarburg | Aarburg |
| Aardman Animations | Aardman Animations |
| Aardvark | Aardvark |
| aardvark (Orycteropus afer) | border |
| aardwark | aardvark |
| Aarhus Fremad | Aarhus Fremad |
| Aarhus GF | Aarhus Gymnastik Forening |
| Aaron Abeyta | Aaron Abeyta |
| Aaron Burr | Aaron Burr |
| Aaron Carter | Aaron Carter |
| Aaron Ciechanover | Aaron Ciechanover |
| Aaron Copland | Aaron Copland |
| Aaron Klug | Aaron Klug |
| Aaron Lennon | Aaron Lennon |
| Aaron Nimzowitsch | Aron Nimzowitsch |
| Aaron Spelling | Aaron Spelling |
| aaronita | Aaronite |
| Aars | Aars |
| Aarslev | Årslev municipality |
| Aaru | Aaru |
| Aarup | Aarup |
| Aarwangen | Aarwangen |
| Aarão | Aaron |
| Aaskov | Aaskov Municipality |
| Aasvero | Ahasuerus |
| Aasverus | Ahasuerus |
| Ab urbe condita | Ab urbe condita |
| ab-reagir | abreact |
| ab-reação | abreaction |
| ab-rogar | annul |
| ab-rogativo | abrogative |
| ab-rogação | abolition |
| ab-rogável | abrogable |
| aba | ledge |
| abaate | border |
| Ababde | Ababda |
| Abaca Khan | Abaqa Khan |
| abacate | avocado |
| Abacateiro | Avocado |
| abacaxi | pineapple |
