| Kosmonaut | cosmonaut |
| Kosmonautin | spacewoman |
| Kostenart | cost element |
| Vormonat | previous month |
| Konsonant | consonant |
| Kosmodrom | cosmodrome |
| Kosename | pet name term of endearment |
| Kosinus | cosine |
| Kosmologe | cosmologist |
| Kosmopolit | cosmopolitan cosmopolite |
| Kosmos | cosmos |
| Kosovare | Kosovan |
| Komondor | Komondor |
| hormonal | hormonal |
| Frostmonat | Frimaire |
| Keimmonat | Germinal |
| Monat | month |
| Karbonat | carbonate |
| Koronal | coronal |
| koronal | coronal |