| Synthese | synthesis |
| Synthesegas | synthesis gas |
| Biosynthese | biosynthesis |
| Synapse | synapse |
| Synopse | synopsis |
| Synthese-Index | synthetic index |
| Synthesizer | synthesizer |
| Syntänie | synteny |
| Synästhesie | synesthesia synaesthesia synæsthesia |
| Epenthese | epenthesis |
| Diathese | voice diathesis |
| Hypothese | hypothesis |
| Orthese | orthosis orthotic |
| Prothese | prosthesis denture |
| These | thesis |
| Bildsynthese | render |
| Synesis | constructio ad sensum |
| Fotosynthese | photosynthesis |
| Synagoge | synagogue synagog shul temple |
| Synergie | synergy |