| Ökonomismus | economism |
| Ökologismus | environmentalism |
| Ökotourismus | ecotourism |
| ökonomisch | economic economical |
| Konformismus | conformism |
| Ikonismus | iconism |
| Nomismus | nomism |
| Kolorismus | colorism |
| Ökofeminismus | ecofeminism |
| Okonomiyaki | okonomiyaki |
| Ökonomie | economy |
| Ökonomin | economist |
| Nonkonformismus | nonconformity |
| Ikonoklasmus | iconoclasm |
| Antinomismus | antinomianism |
| Thomismus | Thomism |
| Akademismus | academicism |
| Totemismus | totemism |
| Animismus | animism |
| Optimismus | optimism |