| kostenfrei | cost-free free of cost |
| Kostenart | cost element |
| Osterei | Easter egg |
| rostfrei | rustless rustproof |
| faltenfrei | wrinkle-free |
| glutenfrei | gluten-free |
| busenfrei | topless |
| sorgenfrei | carefree happy-go-lucky untroubled |
| wolkenfrei | cloud-free |
| koffeinfrei | decaffeinated |
| kontextfrei | context-free |
| Kosename | pet name term of endearment |
| Kosten | cost charges expenses fees damage |
| kosten | cost take get a taste of taste try enjoy |
| Kostenträger | cost object |
| kostenlos | free gratuitous free of charge |
| Ostende | Ostend |
| frostfrei | frost-free |
| Kastenform | tin |
| Küstenmeer | territorial waters |