| Konfliktdiamant | blood diamond |
| Konfliktpartei | belligerent |
| Blutdiamant | blood diamond |
| Kondiment | condiment |
| Kontaktdaten | contact details |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Konflikt | conflict clash |
| konfligieren | conflict#Verb |
| konkomitant | concomitant |
| konziliant | conciliatory |
| Konduktion | conduction |
| Konfiszierung | confiscation |
| Konkavität | concavity |
| Konkrement | calculus |
| Konnektivität | connectivity |
| Kontaktzaun | electric fence |
| Kontingent | contingent |
| kontingent | contingent |
| Kontinuante | reflex |
| Kontraalt | contralto |