| Störfaktor | disruptive element |
| Formfaktor | form factor |
| Atomreaktor | nuclear reactor |
| Biofaktor | biofactor |
| Traktor | tractor |
| Störfall | incident |
| Iterator | iterator |
| Korrektor | proofreader |
| Sternentor | stargate |
| Distraktor | distracter |
| Faktor | factor merchant |
| Klirrfaktor | distortion factor |
| Primfaktor | prime factor |
| Reaktor | reactor |
| Refraktor | refracting telescope refractor |
| Sternmotor | radial engine |
| Torfmoor | peat bog |
| Stockcar | demolition derby |
| Stopfleber | foie gras |
| Stoßantwort | impulse response |