| Cycloalkan | cycloalkane |
| Cyclobutan | cyclobutane |
| Cyclohexan | cyclohexane |
| Cycloheptan | cycloheptane |
| Cyclopentan | cyclopentane |
| Cyclopropan | cyclopropane |
| Cyclohexanol | cyclohexanol Cyclohexyl Alcohol Naxol hexahydrophenol hydrophenol hydroxycyclohexane |
| Cyclone | Cyclone |
| Heckbalken | transom |
| Alkan | alkane |
| Balkan | Balkans Balkan |
| Dachbalken | roof beam |
| Kehlbalken | collar beam |
| Rollbalken | scroll bar scrollbar |
| Ryokan | ryokan |
| Cyclodextrin | cyclodextrin |
| cyclisieren | cyclize |
| Clown | clown |
| Clownin | clowness |
| Kloake | sewage system cloaca |