| Anorthosit | anorthosite |
| Anorthit | anorthite |
| unorthodox | licentious |
| Nordost | northeast |
| Kortholt | kortholt |
| Orthoepie | orthoepy |
| Apartheit | distinctiveness unusualness |
| Anopsie | anopia |
| Anöstrus | anestrus |
| Canophobie | cynophobia |
| Anorexie | anorexia anorexia nervosa |
| Anorganik | inorganic chemistry |
| anotherm | anothermal |
| Nordwest | northwest north-west |
| Hortensie | hydrangea |
| Orthogon | rectangle |
| Portrait | portrait |
| Shortlist | short list |
| Tortuosität | tortuosity |
| a fortiori | a fortiori |