| fehlerfrei | faultless flawless accurate perfect |
| Fehlerfreiheit | accuracy |
| Hehlerei | receiving stolen goods |
| fieberfrei | afebrile |
| fehlerhafte | mispronunciation |
| Fehler | error mistake fault defect blemish flaw snag shortcoming drawback weakness |
| Fehlerprofil | error measurement |
| fehlerhaft | faulty erroneous flawed |
| fehlerlos | flawless |
| Kellerei | winery |
| Keilerei | brawl |
| teilerfremd | co-prime coprime relatively prime |
| steuerfrei | tax-exempt tax-free taxless |
| zuckerfrei | sugar-free |
| Feuer frei! | fire at will |
| faltenfrei | wrinkle-free |
| fettfrei | fat-free |
| schmerzfrei | indolent |
| wahlfrei | optional |
| bleifrei | unleaded lead-free non-lead |