| Nikodemus | Nicodemus |
| Nikolaus | Saint Nicholas Santa Claus Nicholas Nickolas Nikolas Niccolas Nichalas Nichelas |
| Nikoletta | Nicolette |
| Ikonismus | iconism |
| Sikhismus | Sikhism |
| Titoismus | Titoism |
| Nikud | nikud |
| Nike | Nike |
| Nikobaren | Nicobar Islands |
| Nikolait | Nicolaitan |
| Nikosia | Nicosia |
| Nikotin | nicotine |
| Ikone | icon |
| Pikometer | picometer picometre |
| Kode | code |
| Kodein | codeine |
| koden | code |
| Kodex | code codex manuscript |
| Köder | bait |
| ködern | attract bait |