| Subject | English | Italian |
| med. | Alder anomalia of granulation | anomalia di Alder |
| nat.sc., agric. | alder buckthorn | frangola (Rhamnus frangula) |
| nat.sc., agric. | alder buckthorn | alno nero (Rhamnus frangula) |
| nat.sc., agric. | alder flea weevil | orcheste dell'ontano (Orchestes alni, Rhynchaenus alni, Rhynchaenus alni alni) |
| nat.res., agric. | alder leaf-beetle | crisomela dell'ontano (Agelastica alni) |
| forestr. | alder-tree | ontano (Alnus spp.) |
| agric. | ash-alder wood | foresta alluvionale |
| agric. | berry-bearing alder | alno nero (Rhamnus frangula) |
| agric. | berry-bearing alder | frangola (Rhamnus frangula) |
| agric. | black alder | ontano napoletano (Alnus glutinosa) |
| agric. | black alder | ontano nero (Alnus glutinosa) |
| agric. | black alder | ontano peloso (Alnus glutinosa) |
| agric. | black alder | ontano (Alnus glutinosa) |
| agric. | black alder | alno (Alnus glutinosa) |
| agric. | common alder | ontano napoletano (Alnus glutinosa) |
| agric. | common alder | alno (Alnus glutinosa) |
| agric. | common alder | ontano (Alnus glutinosa) |
| agric. | common alder | ontano peloso (Alnus glutinosa) |
| chem. | Diels-Alder reaction | reazione Diels-Alder |
| agric. | European alder | ontano nero (Alnus glutinosa) |
| agric. | European alder | ontano (Alnus glutinosa) |
| agric. | European alder | ontano peloso (Alnus glutinosa) |
| agric. | European alder | ontano napoletano (Alnus glutinosa) |
| agric. | European alder | alno (Alnus glutinosa) |
| nat.sc., agric. | European green alder | ontano verde (Alnus viridis) |
| nat.sc., agric. | gray alder | ontano bianco (Alnus incana) |
| nat.sc., agric. | green alder | ontano verde (Alnus viridis) |
| nat.sc., agric. | grey alder | ontano bianco (Alnus incana) |
| agric. | grey alder | ontano peloso (Alnus incana) |
| nat.sc., agric. | hazel alder | alno comune (Alnus rugosa, Alnus serrulata) |
| nat.res. | Japanese alder | alno giapponese (Alnus japonica) |
| forestr. | Oregon alder | ontano dell'Oregon (Alnus oregona, Alnus rubra) |
| forestr. | red alder | ontano dell'Oregon (Alnus oregona, Alnus rubra) |
| nat.sc., agric. | smooth alder | alno comune (Alnus rugosa, Alnus serrulata) |
| nat.sc., agric. | speckled alder | ontano bianco (Alnus incana) |
| agric. | speckled alder | ontano peloso (Alnus incana) |
| forestr. | western alder | ontano dell'Oregon (Alnus oregona, Alnus rubra) |
| nat.sc., agric. | woolly alder aphid | afide lanigero dell'ontano (Paraprociphilus acerifolii, Paraprociphilus tesselatus, Prociphilus tesselatus) |
