| acromial | acromial |
| acromioclavicular | acromioclavicular |
| acromion | acrómio |
| Acron | Akron |
| acronictionary | siglário |
| acronym | acrônimo |
| acronymization | siglagem |
| acropetal | acropetal |
| acrophase | acrofase |
| acrophobia | medo de altura |
| acrophobic | acrofóbico |
| acrophonical | acrofónico |
| acrophony | acrofonia |
| acropolis | acrópole |
| Acropolis Museum | Museu da Acrópole de Atenas |
| Acropolis of Athens | Acrópole de Atenas |
| Acropomatidae | Acropomatidae |
| acroscopic | acroscópico |
| acrosin | acrosina |
| acrosomal | acrossomal |
| acrosome | acrossomo |
| across | através |
| across from | contra |
| across the board | generalizado |
| Across the Starlit Sky | Across The Starlit Sky |
| Across-the-board | General |
| acrostic | acróstico |
| acrostical | acróstico |
| acrostically | acrosticamente |
| acroterium | acrotério |
| acrotomophilia | acrotomofilia |
| acrylamide | acrilamida |
| acrylate | acrilato |
| acrylic | acrílico |
| acrylic acid | ácido acrílico |
| acrylonitrile | acrilonitrila |
| Acrylonitrile butadiene styrene | ABS |
| act | ação |
| Act alone | Cavalo |
| act as | servir como |
| Act as interpreter | Interpretação para os surdos |
| act before | agir antes |
| act big | agir com presunção |
| act boastfully | agir com presunção |
| act for | representar |
| act haughty towards | sentir-se superior |
| act in opposition to | opor-se |
| Act in the law | Negócio jurídico |
| Act of deriving | Derivada |
| act of God | ato da natureza |
| act of God motorbyke | motivo de força maior |
| Act of Mediation | Ata de Mediação |
| Act of oblivion | Anistia |
| Act of Parliament | Direito |
| Act of violence | Exacção |
| act on one's own discretion | agir como manda a razão |
| act or effect of being or becoming equal | empateeira |
| act uppity towards | sentir-se superior |
| Actaea | Actaea |
| Actaea spicata | Actaea |
| Actaeon | Acteon |
| actant | actante |
| Acteal massacre | Massacre de Acteal |
| acteme | actema |
