| Prüfer | validator |
| Prüferin | validator |
| Prüder | prude |
| prüfen | check examine |
| Prüde | prude |
| prüde | prudish |
| Prügel | thrashing trouncing cudgel stick baton |
| Anrufer | caller |
| rufen | shriek call shout |
| Käufer | buyer |
| Küfer | cooper |
| Läufer | runner bishop armature muller |
| Säufer | alcoholic |
| Täufer | baptist |
| Ufer | shore bank |
| Puffer | buffer |
| Prusten | gasp |
| prusten | snort snort with laughter |
| Sprudel | fizzy water |
| prüfender | scrutiny |