| 21. | Kenia | n.p.m. (geo.: monte, stato) Kenjo |
| 22. | keniano | A agg. kenja B s.m. kenjano |
| 23. | kepleriano | agg. (sci.) keplera |
| 24. | kermesse | s.f. kermeso |
| 25. | ketch | s.m. (mar.) keĉo |
| 26. | ketchup | s.m. (cuc.) keĉupo |
| 27. | keyboard | s.m. (mus.) kiboo |
| 28. | keynesiano | agg. kejnsa |
| 29. | keyword | s.m. (inf.) ŝlosilvorto |
| 30. | khmer | A s.m. (etn.) ĥmero B agg. ĥmera |
| 31. | kibbuz | s.m. kibuco |
| 32. | kidnapping | s.m. infanrabo |
| 33. | killer | A s.m. sikario B agg. murda sostanza killer murda substanco Vedi anche: assassino; omicida; pistolero; sicario; uccisore |
| 34. | kilt | s.m. (abbigl.) kilto |
| 35. | kimberlite | s.f. (min.) kimberlito |
| 36. | Kindergarten | s.m. infanĝardeno, infanvartejo |
| 37. | Kinderheim | s.m. infanvartejo |
| 38. | king size | loc.agg. granddimensia |
| 39. | kino | s.m. (bot.) kinkono |
| 40. | Kirsch | s.m. kirŝo |