| sekundär | secondary |
| Sekundärwald | second-growth forest |
| Sekundant | second |
| Sekunde | second |
| pekuniär | pecuniary monetary |
| Secunda | double pica |
| Sekundärquelle | secondary source |
| Sekretär | secretary |
| Sekundärtugend | secondary virtue |
| bekunden | testify express state show |
| fekund | fecund |
| unkündbar | binding permanent |
| Sunda | Sundaland |
| Sünder | sinner |
| Skandal | scandal |
| legendär | legendary |
| Sektglas | flute |
| Sekante | secant |
| Sektor | sector |
| sektoral | sectoral sectorial |