Erayada ka bilowda xarafka S ee Walax-ogaalka (physics)
- Salt: Milix
- Satellite: Dayax-gacmeed
- Saturn: Saateen
- Scalar: Foolwaa
- Scalar Quantity: Xaddi Foolwaa
- Screw: Iskuruu
- Search Light: Ilays-raadiye
- Semiconductor: Ingudbiye
- Series: Tax
- Sextant: Xagal-cabbire
- Shadow: Hadh
- Short wave: Hir gaaban
- Shunt: Caabbi-korodh
- Side band: Liid dhinac
- Signal: Sinyaale
- Size: Jimidh
- Sine: Sayn
- Siren: Dist Daawaha Sayran
- S.I. Units: Halbeegga S.I.
- Slit: Dalool
- Smooth surface: Gibil siman
- Solar eclipse: Qorrax-madoobaad
- Solenoid: Duub Xaasaw
- Sound: Jabaq
- Sound Energy: Tamar Jabaq
- Sonometer: Jabaqbeege
- Spectral Lines: Xarriijimaha Jeegaanta
- Spectrum: Jeegaan
- Spectrum Emission: Bikaacin Jeegaan
- Spectrum Continuos: Jeegaan iskujoog
- Spin: Winiin
- Stable: Deggen
- Standing Waves: Hirar taagan
- Standard: Beegaal
- Star: Xiddig
- State: Xaalad
- Static Electricity: Danab neg
- Statics: Negayaal
- Steam: Uumi
- Steam Engine: Injiin Uumi
- Step-up transformer: Dooriye Kordhiye
- Storage Cell: Unug kaydiye
- S.T.P. (Standard Temperature Pressure): B.H.C. (Beegaal Heerkul Cadaadis)
- Strain: Mashaqo
- Strength: Quwad
- Stress: Shad
- Stroboscope: Istaroboskoob
- Superconductivity: Gudbin sare
- Superconductor: Gudbiye sare
- Surface: Dul
- Surface Friction: Dusha isliska
- Surface Tension: Gigsanaanta Dusha
- Susceptibility: Nuglaansho
- Suspension: Lalmasho
- Switch: Fure
- Symmetry: Wanqar
- Synthesis: Samayn
- Syphon: Sayfoon
- System: Hab
- System, heterogeneous: Hab kalabah
- System, homogeneous: Hab Iskubah
- Step-down transformer: Dooriye dhime