| Syndrom | syndrome |
| Synonym | synonym convertible terms equivalent terms synonymous word |
| synonym | synonymous |
| synchron | synchronous synchronic |
| Sandra | Sandra |
| Chondrom | chondroma |
| Dendron | dendron |
| hydro- | hydro- |
| Aerodrom | aerodrome |
| Prodrom | prodrome |
| Strom | current torrent stream |
| Asyndeton | asyndeton |
| Synesis | constructio ad sensum |
| Downsyndrom | Down syndrome Down's syndrome |
| Synagoge | synagogue synagog shul temple |
| Synapse | synapse |
| Syndikat | syndicate |
| Synergie | synergy |
| Synkope | syncope fainting |
| Synode | synod ecclesiastical council |