- sound cement
- sound dispersion
- sound door
- slab band
- slab pavement
- slab roof
- slab warping
- slabbing crater
- slabs
- slackening
- slade
- slag cushion
- slag resistance
- slag yard
- slaked slag
- slaking
- slaking rate
- slanted rafters
- slate cutter
- slater
- slaty cleavage
- slave
- slay
- sled
- sledge
- sleep time
- sleeper
- sleeper fastening
- sleeper-bed
- sleeve bearing
- slewing limiter
- slide coil
- sliding gate
- sliding lathe
- sliding mold
- sliding partition
- sliding restraint
- slime coating
- sling unit
- slip erosion
- slip mixing
- slip partition
- slippage
- slogan
- slope angle
- slope exposure
- slope filter
- slope grading
- slope protection
- slope stability
- slope steepness
- slope work
- sloping beam
- sloping section
- slot bin
- slotted breakwater
- slotted rivet
- slotting
- slow filter
- slow hardening
- slow train
- sludge age
- sludge densifier
- sludge digestion
- sludge feeder
- sludge pump
- sluice pillar
- slurry consumption
- slurry feeder
- slurry ring
- slurry sump
- slush
- small rail
- small shot
- small-piece
- smile
- smog
- smoke shelf
- smoke stratification
- smoked glass
- smoking-room
- smoky quartz
- smooth file
- smooth flooring
- smooth wire
- smoothing painting
- snap moulding
- snow guard
- snow loader
- snow nozzle
- snowbreak
- snowdrift ridge
- snowy zone
- soakage drain
- soaking
- social activity
- social planning
- social stratification
- sock
- soda soil