| synthetisch | synthetic |
| syndetisch | syndetic |
| syntaktisch | syntactic syntactical syntactically |
| synästhetisch | synaesthetic |
| synergetisch | synergetic |
| asyndetisch | asyndetic |
| synoptisch | synoptic synoptical |
| syntonisch | syntonic |
| epenthetisch | epenthetic |
| hypothetisch | hypothetical hypothetic |
| pathetisch | declamatory elevated emotional emotive histrionic impassioned |
| sthenisch | sthenic |
| thetisch | thetic |
| ästhetisch | aesthetic |
| systemisch | systemic |
| synaptische | synaptic |
| synonymisch | synonymous |
| Synkretist | syncretist |
| Synthese | synthesis |
| Synthesizer | synthesizer |