| Refraktor | refracting telescope refractor |
| refraktär | refractory |
| Reflektor | reflector |
| Reaktor | reactor |
| Reformator | reformer |
| Fraktur | fracture blackletter script |
| Traktor | tractor |
| Faktor | factor merchant |
| Deflektor | deflector |
| Rektor | rector principal |
| Reflektion | reflection |
| Referat | report lecture presentation talk paper project department division unit |
| Refrain | refrain |
| Refraktometer | refractometer |
| Befrager | interviewer pollster |
| Gefreiter | lance corporal corporal |
| Befrachter | shipper |
| Fraktal | fractal |
| fraktal | fractal |
| Fraktion | parliamentary party faction fraction |