| Rhesusfaktor | Rhesus factor |
| Rhesusaffe | rhesus macaque |
| Inputfaktor | factor of production |
| Reaktor | reactor |
| Refraktor | refracting telescope refractor |
| Resonator | resonator |
| Ehestifter | matchmaker |
| resultatlos | fruitless |
| Resultat | result outcome corollary |
| Ausfalter | foldout |
| Formfaktor | form factor |
| Lorentzfaktor | Lorentz factor |
| Biofaktor | biofactor |
| Faktor | factor merchant |
| Klirrfaktor | distortion factor |
| Manufaktur | manufactory manufacture |
| Primfaktor | prime factor |
| Störfaktor | disruptive element |
| Umweltfaktor | environmental factor |
| Distraktor | distracter |