| Refraktometer | refractometer |
| Refraktor | refracting telescope refractor |
| Hektometer | hectometer hectometre |
| refraktär | refractory |
| Adaptometer | adaptometer |
| Attometer | attometer attometre |
| Aräometer | areometer |
| Ergometer | ergometer |
| Radiometer | radiometer |
| Tetrameter | tetrameter |
| Reflektor | reflector |
| reflektieren | reflect to be interested |
| Befrachter | shipper |
| Olfaktometrie | olfactometry |
| Reaktor | reactor |
| Redakteur | editor |
| Hektoliter | hectolitre |
| Azetometer | acetimeter |
| Elastomer | elastomer |
| Magnetometer | magnetometer |