- smokeless powder
- smoky quartz
- smudge oil
- snake venom
- snubbing post
- soap boiling
- soap chip
- soap dye
- soap kettle
- soap slab
- soapstone
- soapy lustre
- soda ash
- soda process
- sodalite
- sodium alum
- sodium borate
- sodium chloride
- sodium hydroxide
- sodium sulfate
- soft annealing
- soft tallow
- softener
- soil binder
- solanidine
- solar distillation
- solar evaporation
- solar oil
- soldered joint
- sounding balloon
- sounding borer
- soundness test
- sour gum
- sour oil
- source rock
- space formula
- space model
- space-centered
- space-centred
- spading bit
- spar varnish
- sparging
- spark fuse
- spark ignition
- spark screen
- sparking
- sparkless
- Sparnacian stage
- sparry
- sparry limestone
- spathic
- spectral line
- spectral logging
- spectrochemical log
- specular
- spending time
- spent caustic
- spent material
- spent oxide
- sperm oil
- Sperry process
- sphenoid
- sour dough
- sour gasoline
- sourish
- soya oil
- soybean oil
- space chemistry
- space velocity
- spacing bush
- spar
- spark arrester
- sparker
- sparkle
- spathic limestone
- spatter
- spear
- spear pyrite
- spearhead
- special oil
- specific adhesion
- specific weight
- spectral log
- specular coal
- speed change
- speed range
- spent charge
- spent tan
- spermaceti
- spheroidal jointing
- spheroidal parting
- spheroidal structure
- spherulitic
- specific activity
- specific capacity
- specific conductance
- specific dispersion
- specific heat
- specific mass
- specific surface