| synonymous | synonyme |
| synopsis | abrégé |
| Synoptic gospels | Évangiles synoptiques |
| Synoptic problem | Problème synoptique |
| Synoptic scale meteorology | Échelle synoptique |
| Synoptic table of the principal old world prehistoric cultures | Tableau synoptique des principales cultures préhistoriques du Vieux Monde |
| Synostosis | Synostose |
| synovia | synovie |
| synovium | membrane synoviale |
| syntactic | syntactique |
| Syntactic stylistics | Syntaxe |
| syntactically | syntaxiquement |
| syntactician | syntacticien |
| Syntagma Square | Place Syntagma |
| Syntagma station | Syntagma |
| syntax | syntaxe |
| syntax highlighting | coloration syntaxique |
| Syntax of programming languages | Syntaxe |
| Synth | Synthétiseur |
| Synth pad | Pô |
| Synth rock | Electro rock |
| Synthenex | Synthenex |
| synthesis | synthèse |
| synthesize | synthétiser |
| synthesizer | synthétiseur |
| synthetic | synthétique |
| Synthetic biology | Biologie synthétique |
| Synthetic diamond | Diamant synthétique |
| Synthetic element | Élément synthétique |
| Synthetic language | Langue synthétique |
| Synthetic languages | Langue synthétique |
| Synthetic materials | Matières plastiques biodégradables |
| Synthetic oil | Huile de synthèse |
| synthetics | produits synthétiques |
| Synthon | Synthon |
| Synthpop | Synthpop |
| syntonic | syntone |
| Syntonic comma | Comma syntonique |
| Syphax | Syphax |
| syphilis | syphilis |
| syphilitic | syphilitique |
| syphon | siphon |
| Syr Darya | Syr-Daria |
| Syracuse | Syracuse |
| Syracuse Chiefs | Syracuse Chiefs |
| Syracuse Crunch | Crunch de Syracuse |
| Syracuse Orange | Syracuse University Orange |
| Syre | Syre |
| Syreeta Wright | Syreeta Wright |
| Syrena | Sirène |
