| nuklear | nuclear |
| Nuklearwaffe | nuclear weapon |
| Nuklease | nuclease |
| Nukleon | nucleon |
| Nukleus | (cell) nucleus cytoblast nucleus |
| Nuklid | nuclide |
| Küklein | chick |
| Gaukler | bateleur |
| Hakler | hooker |
| Makler | broker |
| Nuklearenergie | nuclear power |
| Nukleosom | nucleosome |
| Nukleotid | nucleotide |
| antinuklear | antinuclear |
| homonuklear | homonuclear |
| Nubukleder | nubuck |
| Euklid | Euclid |
| Hackler | worker |
| Kleber | adhesive |
| Klerf | Clervaux |