| Spekulum | speculum |
| Spektrum | spectrum |
| Säkulum | century |
| Spekulant | speculator |
| Spermium | spermatozoon |
| Sepalum | sepal |
| Spelze | chaff |
| aspektuell | aspectual |
| spektral | spectral |
| Speedrun | speedrun |
| Speil | splinter |
| Spekulatius | windmill cookie |
| Spelunke | dive |
| Spelz | spelt |
| Spengler | tinsmith |
| spekulativ | speculative |
| Seeküste | seashore |
| Seekuh | sea cow sirenian |
| Sekunde | second |
| stiekum | furtively quiet secretly |