- scalar
- Schwarzschild Radius
- shape
- SI
- simple object
- simultaneous
- singularity
- size
- space
- space/motion
- spacetime
- specific volume
- speed
- speed of light
- spin
- spin effects
- spin energy
- spin-up
- spinergy
- spinfall
- spinfall hollow effects
- spinfield
- spinfield hollow
- spinoff
- spinon
- spinrise
- spinrise matter core
- spinrise matter membrane
- spinrise matter plasm
- spontaneous neutron transformation
- stable
- states of matter
- strong nuclear force
- structure
- strut
- substance
- surface of closure
- synchronous
- synergy
- system of reference