| Alternanthera | Alternanthera |
| alternate | alterner |
| Alternate history | Uchronie |
| Alternate reality game | Jeu en réalité alternée |
| alternating | alternant |
| alternating current | courant alternatif |
| Alternating group | Groupe alterné |
| Alternating series | Série alternée |
| Alternating series test | Critère de convergence des séries alternées |
| alternative | alternatif |
| Alternative comics | Bande dessinée alternative |
| Alternative cost | Coûts marginaux |
| Alternative culture | Rock alternatif |
| Alternative history | Uchronie |
| Alternative Investment Market | Alternative Investment Market |
| Alternative libertaire | Alternative libertaire |
| alternative material | matériau alternatif |
| Alternative media | Média alternatif |
| Alternative medicine | Médecine non conventionnelle |
| Alternative metal | Metal alternatif |
| Alternative propulsion | Propulsion alternative |
| Alternative school | École privée adoptant des méthodes nouvellles |
| Alternative service | Service civil |
| alternative technology | technologie propre |
| alternatively | sinon |
| alternator | alternateur |
| Alternext | Alternext |
| Alterswil | Alterswil |
| Altes Museum | Altes Museum |
| AltGr key | Touche Alt Gr |
| Althaea | Althée |
| Altheim | Altheim |
| Althen-des-Paluds | Althen-des-Paluds |
| Althing | Althing |
| although | quoique |
| Althütte | Althütte |
| Altiani | Altiani |
| Altichiero | Altichiero da Zevio |
| Altiero Spinelli | Altiero Spinelli |
| Altikon | Altikon |
| Altillac | Altillac |
| altimeter | altimètre |
| altimetry | altimétrie |
| Altingiaceae | Altingiaceae |
| Altiphrynoides | Altiphrynoides malcolmi |
| Altiplano | Altiplano |
| Altirhinus | Altirhinus |
