| Zirkulation | circulation |
| Ejakulation | ejaculation |
| Kalkulation | calculation costing |
| Spekulation | speculation |
| Simulation | simulation |
| Perkolation | percolation |
| Inkubation | incubation |
| Geldzirkulation | circulation |
| Zirkular | circular letter |
| Zirkulieren | circulation |
| zirkulieren | circulate |
| Zirkumzision | circumcision |
| Luftzirkulation | air circulation |
| zirkadian | circadian |
| Okkultation | occultation |
| Artikulation | articulation |
| Auskultation | auscultation |
| Fabulation | fib |
| Simulatin | malingerer |
| Emulation | emulation |