| alcalin | alkaline |
| Alcalinisation | Alkalization |
| alcalins | alkaline |
| Alcalose | Alcalosis |
| alcaloïde | alkaloid |
| Alcalà de Xivert | Alcalà de Xivert |
| Alcalá | Alcalá |
| Alcalá de Guadaíra | Alcalá de Guadaíra |
| Alcalá de Henares | Alcalá de Henares |
| Alcamo | Alcamo |
| Alcamène | Alcamenes |
| alcane | paraffin |
| Alcantara | Alcantara |
| Alcara Li Fusi | Alcara li Fusi |
| Alcatel | Alcatel |
| Alcatel Alenia Space | Thales Alenia Space |
| Alcatraz | Alcatraz Island |
| Alcazaba | Alcazaba |
| Alcazar | Alcázar |
| Alcazar de Tolède | Alcázar of Toledo |
| Alcedininae | River kingfishers |
| Alcedo | José Bernardo Alcedo |
| Alcelaphinae | Alcelaphinae |
| Alceste | Alcestis |
| Alchenstorf | Alchenstorf |
| alchimie | alchemy |
| alchimique | alchemical |
| alchimiste | alchemist |
| Alcibiade | Alcibiades |
| Alcidamas | Alcidamas |
| Alcide De Gasperi | Alcide De Gasperi |
| Alcides Ghiggia | Alcides Ghiggia |
| Alcime | Alcimus |
| Alcinoos | Alcinous |
| Alciphron | Alciphron |
| Alcman | Alcman |
| Alcmond de Derby | Alcmund of Derby |
| Alcmène | Alcmene |
| Alcméon | Alcmaeon |
| Alcméon de Crotone | Alcmaeon of Croton |
| Alcméonides | Alcmaeonidae |
| Alcoa | Alcoa |
| Alcobendas | Alcobendas |
| Alcock et Brown | Alcock and Brown |
| Alcoholics Anonymous suite | Alcoholics Anonymous Suite |
| Alcoià | Alcoià |
| alcool | alcohol |
| Alcool benzylique | Benzyl alcohol |
| alcool dénaturé | methylated spirits |
| Alcool furfurylique | Furfuryl alcohol |
| Alcool gras | Fatty alcohol |
| alcool méthylique | methyl alcohol |
| Alcool polyvinylique | Polyvinyl alcohol |
| alcool à brûler | methylated spirits |
| alcool à désinfecter | rubbing alcohol |
| alcool éthylique | ethyl alcohol |
