| Kopialbuch | cartulary |
| Spielbuch | gamebook |
| Kopftuch | headscarf kerchief head-kerchief |
| Choralbuch | hymnal |
| Digitalbuch | e-book |
| Malbuch | coloring book |
| Comicbuch | comic book |
| Kontobuch | account book |
| Kochbuch | cookbook |
| Notizbuch | notebook |
| Sparbuch | bankbook passbook |
| Kopiar | cartulary |
| Kopplung | coupling |
| Koptisch | Coptic |
| koptisch | Coptic |
| Kopf hoch | cheer up chin up |
| Kopflaus | head louse |
| Kopilot | co-pilot copilot |
| Koprolith | coprolite fecaloma coprolith faecalith stercolith stercorolith |
| Topinambur | earth apple jerusalem artichoke sunchoke sunroot topinambur |