| Zirkel | compass pair of compasses circle |
| zirkelhaft | circular |
| Zirbel | Swiss stone pine arolla pine |
| Zirmet | hartwort |
| Zirpen | chirp |
| zirpen | chirp |
| zirka | approximate |
| Zirkon | zircon |
| Zirkus | circus |
| Kirke | Circe |
| Wirken | legacy |
| wirken | work act operate take effect appear seem knit |
| Birke | birch |
| birken | birchen |
| Merkel | Merkel |
| Torkel | winepress press |
| Ferkel | piglet |
| Werkel | hurdy-gurdy street organ |
| Hinkel | chick |
| Zwickel | crotch |