| Synthesegas | synthesis gas |
| Synthese | synthesis |
| Synthesizer | synthesizer |
| Synesis | constructio ad sensum |
| synthetisch | synthetic |
| Syndesmose | syndesmosis |
| synagogal | synagogal |
| Biosynthese | biosynthesis |
| Synapse | synapse |
| Synergie | synergy |
| Synopse | synopsis |
| Syntagma | syntagma |
| Syntax | syntax |
| Synthese-Index | synthetic index |
| Syntänie | synteny |
| Synästhesie | synesthesia synaesthesia synæsthesia |
| synthetisieren | synthesize |
| Epenthesis | epenthesis |
| Xanthogenat | xanthogenate |
| Enthusiast | enthusiast |