| Noctilucin | noctilucine |
| Nocturne | nocturne |
| Oktillion | octillion quindecillion |
| Kotillon | petticoat |
| Nautilus | nautilus |
| Postillion | postilion postillion |
| Potluck | potlatch |
| Rotluchs | bobcat |
| Colchicin | colchicine |
| Necklacing | necklacing |
| Niacin | niacin |
| Nocken | cam |
| noch eine | another |
| noch nicht | not yet |
| nochall | that is to say however completely quite right very absolutely actually really truly |
| Octavian | Octavian |
| Octan | octane |
| Action | action |
| Actinoid | actinide actinoid |
| Reptiloid | reptiloid |