| accustoming | accoutumance |
| ace | as |
| ace in the hole | joker |
| ace of aces | as des as |
| Ace of Base | Ace of Base |
| ace of clubs | as de trèfle |
| ace of diamonds | as de carreau |
| ace of hearts | as de cœur |
| Ace the Bat-Hound | Asso |
| ace up one's sleeve | atout dans la manche |
| Acebutolol | Acébutolol |
| Acela Express | Acela |
| Acer | Acer Incorporated |
| Acer buergerianum | Érable Trident |
| Acer capillipes | Érable jaspé de rouge |
| Acer cappadocicum | Érable de Cappadoce |
| Acer circinatum | Acer circinatum |
| Acer davidii | Érable du Père David |
| Acer ginnala | Acer ginnala |
| Acer griseum | Érable à écorce de papier |
| Acer japonicum | Acer japonicum |
| Acer Laboratories Incorporated | ALi Corporation |
| Acer macrophyllum | Érable à grandes feuilles |
| Acer monspessulanum | Érable de Montpellier |
| Acer negundo | Érable negundo |
| Acer nigrum | Érable noir |
| Acer palmatum | Érable palmé |
| Acer pensylvanicum | Érable de Pennsylvanie |
| Acer platanoides | Érable plane |
| Acer rubrum | Érable rouge |
| Acer saccharinum | Érable argenté |
| Acer saccharum | Érable à sucre |
| Acer spicatum | Acer spicatum |
| Acer tataricum | Érable de Tartarie |
| Aceraceae | Aceraceae |
| acerb | acerbe |
| acerbic | acariâtre |
| acerbity | amertume |
| acerola | acérola |
| Acerra | Acerra |
| Aceruloplasminemia | Acéruléoplasminémie |
| acescence | acescence |
| acescent | acescent |
| Acestes | Aceste |
| Acesulfame potassium | Acésulfame potassium |
| Acetabularia | Acétabulaire |
| acetal | acétal |
| acetaldehyde | acétaldéhyde |
| acetamide | acétamide |
| acetaminophen | paracétamol |
| acetate | acétate |
