| Korrelationskoeffizient | correlation coefficient |
| Variationskoeffizient | coefficient of variation |
| Korrelationsanalyse | correlation analysis |
| Reibungskoeffizient | coefficient of friction |
| Temperaturkoeffizient | temperature coefficient |
| kosteneffizient | cost-effective |
| Korrelation | correlation association |
| kollationieren | collate |
| Populationsökologie | population ecology |
| Ionisationseffekt | ionisation effect |
| Operationszeichen | operator |
| Konfessionslosigkeit | nonsectarianism |
| Binomialkoeffizient | binomial coefficient |
| Geheimdienstoffizier | intelligence officer |
| Herzinsuffizienz | cardiac insufficiency |
| Plazentainsuffizienz | placental insufficiency |
| insuffizient | insufficient |
| korrespondierend | corresponding |
| Korrespondent | correspondent |
| korrespondieren | correspond |