| Syn | Syn and Anti addition |
| SYN cookie | SYN cookies |
| SYN flood | SYN flood |
| synagogue | synagogue |
| Synagogue Beth Sholom | Beth Sholom Synagogue |
| Synagogue de Cluj-Napoca | Cluj-Napoca Reformed Synagogue |
| Synagogue de Deir el Qamar | Deir el Qamar Synagogue |
| Synagogue de Doura Europos | Dura-Europos synagogue |
| Synagogue de Göteborg | Gothenburg Synagogue |
| Synagogue de la Ghriba | El Ghriba synagogue |
| Synagogue de la rue Pavée à Paris | Agoudas Hakehilos Synagogue |
| Synagogue de Larnaca | Larnaca Synagogue |
| Synagogue de Lengnau | Synagogue |
| Synagogue de Lesko | Lesko Synagogue |
| Synagogue de Stockholm | Stockholm Synagogue |
| Synagogue de Trondheim | Trondheim Synagogue |
| Synagogue de Zarzis | Zarzis Synagogue |
| Synagogue El Transito de Tolède | Synagogue of El Transito |
| Synagogue Hekhal Hanes | Hekhal Haness Synagogue |
| Synagogue hollandaise | Hollandse Synagogue |
| Synagogue Maghen Abraham | Maghen Abraham Synagogue |
| Synagogue Maghen Abraham de Beyrouth | Maghen Abraham Synagogue |
| Synagogue Maisel | Maisel Synagogue |
| Synagogue Remuh | Remuh Synagogue |
| Synagogue Santa Maria La Blanca de Tolède | Santa María la Blanca |
| Synagogue Vieille-Nouvelle | Old New Synagogue |
| synalèphe | synalepha |
| Synaphobranchidae | Cutthroat eel |
| Synapomorphie | Synapomorphy |
| synapse | synapse |
| Synapse et transmission synaptique | Chemical synapse |
| Synaptic | Synaptic Package Manager |
| Synaptomys | Bog lemming |
| Synarchie | Synarchism |
| Synaspismós | Synaspismos |
| Synbranchiformes | Synbranchiformes |
| Synchiropus splendidus | Mandarinfish |
| synchrocyclotron | synchrocyclotron |
| synchrone | synchronous |
| synchronique | synchronic |
| synchronisation | synchromesh |
| Synchronisation du temps | Time synchronization |
| synchroniser | synchronize |
